You will need to detail which mods you have in the mod pack as well as if the author has given permission to use those mods in the mod pack.
"Modpack with lots of mods" This isn't true, only 5 little mods and they actually add nearly nothing. Not worth downloading, and you prob didn't asked the original mod authors for permissions to use the mods in a pack. For example: Enhanced Storage (by NeoVanAlemania) You must get the author's consent before including this mod in a compilation. I think you didn't even asked for permissions. What's the point at making your pack public then... Better remove it if it is private, because you see what the results are.