$x\:+\:\sqrt{5}=0$

$\lim_{x\to\infty}\:\frac{\left(-2\right)^x}{1+\left(-2\right)^x}$

$\left(3x^a+\frac{2}{7}y^2\right)^2$

$\int\frac{-4x^2+5x+33}{\left(x-2\right)\left(x+2\right)\left(x-3\right)}dx$

$7\cdot\left(-6\right)+\left(-4+22\right)\cdot3$

$\frac{x}{\frac{x}{3}}$

$\frac{dp}{dt}+p=pte^{t+2}$