Find ∫5x4 dx\displaystyle\int 5x^4\, dx∫5x4dx.
x5+Cx^5 + Cx5+C
5x5+C5x^5 + C5x5+C
20x3+C20x^3 + C20x3+C
25x3+C25x^3 + C25x3+C