As my profile name and avatar suggest, I know metal, old 70's & 80's metal anyway. My name is in fact a Dio reference.
I would suggest some lighter music for calculus, like Winger, Whitesnake, Def Leppard, Bon Jovi, Ratt and the more ballady, hair metal bands for math so it won't impair your focus.
For government and english, I would take the late 70's 'New Wave Of British Heavy Metal' bands like Iron Maiden, Saxon, and Judas Priest, or power metal/shock rock bands bands like Running Wild, Grim Reaper, Helloween or W.A.S.P. You can also go with more straight up acts like Ozzy, Dio, and the like. These bands are better for this because their lyrics often deal with government themes, so if you listen to the words, you can even learn things. Iron Maiden, for one, is like a heavy metal history book.
