$\int tan^4z\:dz$

$\frac{d}{dx}\frac{x^2}{x+y}=y^2+9$

$4x+32+yx+8y$

$\frac{d}{dx}e^x\cdot y^2+x^5=e^y$

$\lim_{x\to0}\left(\frac{sin\left(x\right)tan\left(4x\right)}{1-cos\left(x\right)}\right)$

$\frac{a}{3}-1.31=2.99$

$\lim_{x\to\infty}\left(\left(x^3-7x^2\right)^{\frac{1}{3}}-x\right)$