$\int\frac{12x+8}{x\left(x^2+9\right)}dx$

$\int\left(6sin^3xcos^2x\right)dx$

$8m^2m\:-12m$

$\left(x^2-1\right)\left(x^2-2\right)$

$\left(3\right)\left(-1\right)+0\left(8\right)$

$\lim_{x\to3}\left(\frac{x^2-4x-21}{x-3}\right)$

$8m^4+6m^2-2$