$\frac{cost}{sent}$

$-2\frac{3}{4}+\frac{1}{2}$

$\frac{2}{w^2+15w+56}-\frac{4w}{w^2-w-56}+\frac{3}{w^2-64}$

$\left(a\right)\left(4b\:+\:2x\right)$

$\int\frac{\sqrt{\left(1+\sqrt{x}\right)}}{x}dx$

$\int x^8e^{3x^9}dx$

$\frac{\cos\left(2a\right)+2\sin\left(a\right)^2}{\sin\left(a\right)}$