$\int\left(x^3\sqrt{x^2-3}\right)dx$

$\lim_{x\to\infty}\left(\frac{\left(e^x-1\right)}{\left(x^2+x\right)}\right)$

$( - 901 ) + ( 1 )$

$\:\:3\:\left(x\:+\:2\right)\:=\:\:0\:$

$\frac{2x^4+4x^3-5x^2-2}{x^2+2x-3}$

$x^3\left(x^4+3\right)^6$

$\cos\left(x\right)^4-\sin\left(x\right)^2$