$2x^3+7xy-4xy^2$

$\int\frac{x^3}{\sqrt{16-x^2}}dx$

$\int\frac{2x^2-x+2}{x^3\left(x^2-8\right)}dx$

$\left(t^2+7\right)\left(t^2-2\right)$

$\left(\sqrt{2x}\right)+\left(3\sqrt{y}\right)^2$

$\lim_{x\to\infty}\left(\frac{e^{3x}}{\log_g\left(x\right)}\right)$

$2n^2+15n+7$