$\int-9ln\left(x^2-1\right)dx$

$\frac{\left(\frac{\sin\:^2\left(x\right)}{\cos\:^2\left(x\right)}\right)^{\cos\:\left(x\right)}}{\sin^2\left(x\right)}$

$\frac{-2x}{3}+6\le\frac{-8x}{5}-4$

$-43-\left(-7\right)+\left(-6+9\right)-\left(+14+7\right)-\left(-6+2\right)$

$3\sqrt{6\cdot3+10}$

$\lim_{x\to7}\left(\frac{5-\sqrt{3x+1}}{x^2-49}\right)$

$\frac{dx}{dw}=2y$