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I'm new to modding my Minecraft and it just keeps crashing and I don't know how to fix it.

Can someone help me?

Here's the Crash Report:

get rid of fossil

After getting rid of fossils it sends me this:

---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 8/7/17 2:42 PM
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: thehippomaster/MutantCreatures/MutantSkeleton
at cpw.mods.fml.common.LoadController.transition(LoadController.java:163)
at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:559)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:243)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.NoClassDefFoundError: thehippomaster/MutantCreatures/MutantSkeleton
at thehippomaster.MutantCreatures.item.ChemicalX.<clinit>(ChemicalX.java:83)
at thehippomaster.MutantCreatures.MutantCreatures.preInit(MutantCreatures.java:91)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:532)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:212)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:119)
at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:556)
... 10 more
Caused by: java.lang.ClassNotFoundException: thehippomaster.MutantCreatures.MutantSkeleton
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 38 more
Caused by: java.lang.NoClassDefFoundError: thehippomaster/AnimationAPI/IAnimatedEntity
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
... 40 more
Caused by: java.lang.ClassNotFoundException: thehippomaster.AnimationAPI.IAnimatedEntity
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 44 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 10 (x86) version 10.0
Java Version: 1.8.0_144, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 144882760 bytes (138 MB) / 326930432 bytes (311 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1558 51 mods loaded, 51 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCH mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCH FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1558-1.7.10.jar)
UCH Forge{10.13.4.1558} [Minecraft Forge] (forge-1.7.10-10.13.4.1558-1.7.10.jar)
UCH CodeChickenCore{1.0.7.47} [CodeChicken Core] (minecraft.jar)
UCH NotEnoughItems{1.0.5.120} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.5.120-universal.jar)
UCH <CoFH ASM>{000} [CoFH ASM] (minecraft.jar)
UCH FamiliarsAPI{1.7.10} [Familiars API] (FamiliarsAPI-1.7.10.jar)
UCH battlegear2{1.7.10} [Mine & Blade Battlegear 2 - Bullseye] (1.7.10-MB_Battlegear2-Bullseye-1.0.8.3.jar)
UCH deconstruction{2.2.7} [The Deconstruction Mod] ([MC1.7.10]deconstruction[2.2.7].jar)
UCH heart{2.0.0} [Heart Health] ([MC1.7.X]Hearts-2.0.0.jar)
UCH animalbikes{1.7.10} [Animal Bikes] (AnimalBikes_1.7.10.jar)
UCH ArchimedesShips{1.7.10 v1.7.1} [Archimedes' Ships] (ArchimedesShips-1.7.1.jar)
UCH Backpack{2.0.1} [Backpack] (backpack-2.0.1-1.7.x.jar)
UCH tennox_bacteria{2.3.2} [Bacteria Mod] (BacteriaMod-1.7.10-2.3.2.jar)
UCH AWWayofTime{v1.3.3} [Blood Magic: Alchemical Wizardry] (Blood-Magic-Mod-1.7.10.jar)
UCH EE3{0.3.0.547} [Equivalent Exchange 3] (EquivalentExchange3-1.7.10-0.3.0.547.jar)
UCH TwilightForest{2.3.7} [The Twilight Forest] (twilightforest-1.7.10-2.3.7.jar)
UCH chisel{2.9.4.10} [Chisel] (Chisel-2.9.4.10.jar)
UCH chocolateQuest{1.0} [Chocolate Quest] (chocolateQuest-1.7.10-1.1d.jar)
UCH CoFHCore{1.7.10R3.1.4} [CoFH Core] (CoFHCore-[1.7.10]3.1.4-329.jar)
UCH CustomPets{1.0.5} [Custom Pets] (custompets-1.7.10-1.0.5-universal.jar)
UCH DynamicLights{1.3.9} [Dynamic Lights] (DynamicLights-1.7.10.jar)
UCH DynamicLights_onFire{1.0.5} [Dynamic Lights Burning Entity Module] (DynamicLights-1.7.10.jar)
UCH DynamicLights_creepers{1.0.4} [Dynamic Lights Creeper Module] (DynamicLights-1.7.10.jar)
UCH DynamicLights_dropItems{1.0.8} [Dynamic Lights EntityItem Module] (DynamicLights-1.7.10.jar)
UCH DynamicLights_entityClasses{1.0.1} [Dynamic Lights Entity Light Module] (DynamicLights-1.7.10.jar)
UCH DynamicLights_mobEquipment{1.0.8} [Dynamic Lights Mob Equipment Light Module] (DynamicLights-1.7.10.jar)
UCH DynamicLights_flameArrows{1.0.0} [Dynamic Lights Fiery Arrows Light Module] (DynamicLights-1.7.10.jar)
UCH DynamicLights_floodLights{1.0.2} [Dynamic Lights Flood Light] (DynamicLights-1.7.10.jar)
UCH DynamicLights_otherPlayers{1.0.8} [Dynamic Lights OtherPlayers Light Module] (DynamicLights-1.7.10.jar)
UCH DynamicLights_thePlayer{1.1.4} [Dynamic Lights Player Light Module] (DynamicLights-1.7.10.jar)
UCH eplus{3.0.2-d} [Enchanting Plus] (EnchantingPlus-1.7.10-3.0.2-d.jar)
UCH DefaultMobPack{1.7.10} [DefaultMobPack] (FamiliarsDefaultMobPack-1.7.10.jar)
UCH ExtendedFamPack{1.7.10} [ExtendedFamPack] (FamiliarsExtendedFamPack-1.7.10.jar)
UCH HerobrineFamPack{1.7.10} [HerobrineFamPack] (FamiliarsHerobrineFamPack-1.7.10.jar)
UCH farlanders{1.2b} [The Farlanders] (farlanders-1.7.10-v1.2b.jar)
UCH ironfurnaces{1.2.4} [Iron Furnaces] (ironfurnaces-1.2.4R.jar)
UCH Mantle{1.7.10-0.3.1.jenkins180} [Mantle] (Mantle-mc1.7.10-0.3.1.jar)
UCH AS_Minions{1.9.4} [Minions] (Minions-1.7.10.jar)
UCH MoreEnchants{1.3.0} [MoreEnchants] (MoreEnchants-MC1.7-1.3.1.jar)
UCE MutantCreatures{1.4.9} [Mutant Creatures] (MutantCreatures-1.7.10-1.4.9.jar)
UCH NetherOres{1.7.10R2.3.1} [Nether Ores] (NetherOres-[1.7.10]2.3.1-22.jar)
UCH RottenFleshToLeather{1.7.10-2.0} [Rotten Flesh to Leather] (RottenFleshToLeather-2.1-1.7.10.jar)
UCE SaintsCore{0.9} [Saintscore] (SaintsCore-0.9-Minecraft-1.7.10.jar)
UCH TConstruct{1.7.10-1.7.1.build770} [Tinkers' Construct] (TConstruct-1.7.10-1.7.1b.jar)
UCH dna948{3.1} [The Last Sword You Will Ever Need Mod] (The_Last_Sword_You_Will_Ever_Need_Mod-1.7.10-3.4.jar)
UCH TiCTooltips{1.1.8a} [TiC Tooltips] (TiC-Tooltips-mc1.7.10-1.1.8a.jar)
UCH tinkersdefense{1.0} [Tinkers' Defense] (TinkersDefense-1.0.jar)
UCH TMechworks{0.2.15.106} [Tinkers' Mechworks] (TMechworks-1.7.10-0.2.15.106.jar)
UCH AS_UpdateCheck{1.1.7} [AtomicStryker Update Check Mod] (UpdateCheckerMod-1.7.10.jar)
UCH weaponmod{v1.14.3} [Balkon's WeaponMod] (weaponmod-1.14.3.jar)
GL info: ' Vendor: 'Intel' Version: '4.0.0 - Build 10.18.10.4358' Renderer: 'Intel(R) HD Graphics'
CoFHCore: -[1.7.10]3.1.4-329
Mantle Environment: Environment healthy.
NetherOres: -[1.7.10]2.3.1-22
TConstruct Environment: Environment healthy.
Chisel: Errors like "[FML]: Unable to lookup ..." are NOT the cause of this crash. You can safely ignore these errors. And update forge while you're at it.

Hello?

get rid of mutantcreatures and saintcore. they are both showing errors

The game is working now. So thanks, man

np!