$\frac{\left(2+tan^2\left(x\right)\right)}{\left(sec^2\left(x\right)\right)}$

$\int z^3e^3dz$

$\sqrt{5}\cdot\sqrt{15}\cdot\sqrt{22}$

$\left(a+2\right)\left(a+1\right)-4\left(a+1\right)$

$\int_0^1\frac{e^x}{x}dx$

$\int x\left(3x+e\right)dx$

$-\:7\:+\:2\:+\:4\:+\:5\:-\:6$