$ctga\frac{\:cosa}{sena}$

$3^4\cdot3^{10}$

$\int\frac{18x}{\left(x-8\right)\left(x+11\right)}dx$

$\int_{-\sqrt{3}}^{\sqrt{3}}\left(\frac{x^2}{x^2+1}\right)dx$

$\lim_{x\to0}\left(\frac{e^{\left(2x+1\right)}-e}{x}\right)$

$\int\left(\sin\left(z\right)^3\right)dx$

$\frac{a}{3}+\frac{b^3}{3}$