$\lim_{x\to-2}\left(\frac{5x^2+10x}{\left(x+2\right)\left(x-8\right)}\right)$

$e^{3\ln\left(3\right)}$

$\left[\left(a+b\right)-2\right]\left[\left(a+b\right)+2\right]-\left(a+b\right)^2$

$\left(3y^2x+5xy^2\right)+\left(4xy+3x+2y\right)$

$\frac{7v^2}{4v^3}$

$-5+2c=-15$

$5+11-5-2-9+8+6+8-4-3-8+5+6+5-7$