The issue looks like it is with your galacticraft mod, I would try and find a later version of the mod, delete this from your mods folder and then reinstall the newer version.

Error: java.lang.NoClassDefFoundError: micdoodle8/mods/galacticraft/api/client/tabs/InventoryTabMPM

It looks like you may be missing key mods to run other mods. e.g. MalisisCore is required for any Malisis mod. And if you are using a modpack, you may need to troubleshoot. Try reinstalling the modpack, or changing the settings on whatever you're launching it off of to account for errors. Or another possible issue is that you're not using 64 bit java, in which case use this link https://www.java.com/en/download/manual.jsp to download it.

how did you get the mods and what are you using to launch the pack? -not really needed but for modded using the twitch client just makes things easyer-