$17+\left(-36\right)-\left(-28\right)+15\left(-21\right)-\left(-24\right)-\left(-16\right)-\left(-21\right)-13$

$\int\left(\frac{x}{x^2+7x+6}\right)dx$

$\lim_{x\to5}\left(\frac{x^2+5}{x-5}\right)$

$\int8cos^3\left(x\right)dx$

$\frac{x^3}{3}+1x+1\ln\left(x^2+1\right)+c$

$\left(1-x^3y^{-2}\right)^3$

$\left(a^2+6a+4\right)^2$