$\int4x^{-4}dx$

$\frac{d}{dx}\:\:xseny=22\cdot y$

$\lim_{x\to0}\left(\left(\frac{1}{x^2e^{\left(\frac{x^3}{125}\right)}}\right)-\frac{1}{x^2}\right)$

$\frac{7}{2}z^2+\frac{2}{3}z^2+3z$

$\frac{\sqrt{3}}{4}\left(3.5\right)^2$

$\int9\cdot sin\left(x\right)cos\left(x\right)$

$\int\frac{x^2-3x+4}{\left(x+3\right)\left(x-4\right)}dx$