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

$\frac{3}{5}\int\left(\sin9x\right)dx$

$\int\frac{2x^3+5x+8}{x+1}dx$

$\left(7xy-12\right)\left(12+7xy\right)$

$2\log x=\log36$

$\sin\left(x-180\right)=-sin\left(x\right)$

$\int\frac{1+\sin\left(x\right)\sqrt{x}}{\sqrt{x}}dx$