$\int\left(15sint\right)dt$

$\left(4yzx^2\right)^3$

$3\:x\:\left(-5\right)$

$\frac{1}{x^2}+\frac{-3}{x^2}+\frac{3}{x^2}$

$\lim_{x\to0}\left(\frac{x\left(e^x-cosx\right)}{ln\left(1-x^2\right)}\right)$

$\int\left(6x+21\right)^{-2}dx$

$\frac{\left(5m^3+3n^3\right)\left(56m^4-4n^4\right)}{8m^2n^5}$