$\frac{\cos^2\theta}{1-\sin\theta}=1+\text{sen}\theta$

$\left(-2n^2f^4\right)^3$

$\frac{d}{dx}\sqrt{x}+xy^2=5$

$\int\frac{\left(5x\right)}{\left(4x\right)}dx$

$-\left(-9+5\right)+\left(-4+6\right)-\left(+8-1\right)+\left(-3-7\right)$

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

$\frac{d^4}{dx^4}\left(x^5-15x^{-4}\right)$