$\int3x^4\left(2x^5+9\right)dx$

$4z^3+6xz^2$

$\left(-8m^2n^3\right)\left(-9am^2x^4\right)$

$\int_1^{\infty}e\cdot arctan\left(x\right)dx$

$\frac{dy}{dx}=\left(\frac{\left(2y+3\right)^2}{4x+5}\right)$

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

$\frac{d}{dx}\left(2e^{xy}\right)$