$\int\frac{t^2}{e^{3t^3}}dx$

$\left(1-\sin\:\left(x\right)^4\right)\cdot\sec\left(x\right)^2$

$\left(x+x^2+2\right)^2$

$\:\frac{\left(n\left(x+2\right)^n\right)}{\left(3^{n+1}\right)}$

$\lim_{x\to2}\left(x^3-2x^2+1\right)$

$-11+x=15$

$l^{-1}\left(\frac{1}{8^2+2s+5}\right)$