$\frac{d}{dx}-2x^4-6$

$\frac{cos\left(x\right)}{1-sin\left(x\right)}=sec\left(x\right)\left(1-sin\left(x\right)\right)$

$\int_{\sqrt{2}}^{x^2}\left(tan\left(9t\right)\right)dt$

$\frac{2}{\pi}\int_0^{\pi}\left(\frac{5}{\pi}\right)x\cos\left(2x\right)dx$

$\frac{x^3+y^{12}}{x+y^4}$

$\int_0^0\left(e^{2x}\right)dx$

$\frac{2v^{-2}}{4v}$