$\frac{\left(\sec\:^2\left(x\right)-1\right)}{\sin^2\left(x\right)}-\left(1-\sin^2\left(x\right)\right)\csc^2\left(x\right)=1$

$\int x\cdot e^{\frac{ax}{g}}dx$

$3x+8\ge20$

$\lim_{y\to0}\left(2x^{3x}\right)$

$\frac{1x^4}{25}\:-\frac{9y^4}{16}$

$\int\left(8sin^3x\cdot cos^2x\right)dx$

$\left(-3x^{2\:}-2b\right)^3$