$n^{3=}n$

$\frac{2}{3}b-2\:\frac{3}{4}b$

$b+b^3$

$\int_{\frac{\pi}{10}}^{\frac{\pi}{5}}\sec^2\left(10x\right)e^{\tan\left(10x\right)}dx$

$\int_0^{\infty}x\:dx$

$\frac{1}{csc\left(u\right)}\frac{du}{dt}=cos\left(\frac{x}{2}\right)$

$\frac{sin\:\left(x\right)}{\cos\left(x\right)}+\cos\left(x\right)\sin\left(x\right)=\tan\left(x\right)$