$\frac{du}{dx}=2u$

$\frac{dy}{dx}y=ln\left(cos^{-1}x\right)$

$\lim_{x\to3}\left(\frac{4\sqrt{3x^2-11}-2}{5\sqrt{2x^2+14}-2}\right)$

$-4\left(7b+5\right)=148$

$3\cdot\left(-\frac{1}{3}xy^2\right)\cdot\left(2y\right)^2$

$\int\:\:tan^4\:7x\:\:dx$

$\frac{2}{1}+\frac{1}{1}$