$c^2-48c-8$

$\frac{cot\left(x\right)cos\left(x\right)}{tan\left(-x\right)sin\left(\frac{\pi}{2}-x\right)}$

$\lim_{x\to0}\left(\frac{\left(13^x-9^x\right)}{x}\right)$

$\frac{x^5}{x^{-9}}$

$\int\left(2x-1\right)\left(3x^2+4\right)dx$

$\sqrt[9]{m^{13}}$

$\int_{e^2}^{\infty}\frac{9\ln\left(x\right)}{x}dx$