$v=\frac{1}{3}bh$

$f\left(x\right)\:=\:\:2x\left(x\:+\:1\right)\left(x\:-\:4\right)^2\left(\:2x\:-\:3\right)$

$40x^2y-51x^2y+20x^2y$

$\lim_{x\to0}\left(\frac{\pi\cos\left(\pi x\right)\sin\left(x\right)}{\cos\left(x\right)\sin\left(\pi x\right)}\right)$

$30x^{10}-90x^5-30$

$\frac{5x^2-2x}{y}$

$\left(-4m^2n^3\right)\left(5mn^2\right)$