$\int\left(\frac{\sqrt{121-x^2}}{x}\right)dx$

$\lim_{x\to0.001}\frac{\tan\left(0.001\right)}{\sin\left(0.001\right)}$

$6z-4z-5+8$

$0.6c^2f^2\left(\frac{5}{2}cf-\frac{1}{6}c^{-4}+\frac{15}{2}f^{-6}\right)$

$8y-64=80$

$\:\left(-39\right)\left(5\right)$

$\frac{5x^2+7x-3}{x+3}$