$15-\left(-2+7\right)-5-13-\left(18-9\right)$

$5^2\cdot5^{10}\cdot5^8\cdot5^0\cdot5^{-10}\cdot5$

$ab^2+ab^3+a^2b^3$

$62x^2+x-28$

$\lim_{x\to\pi}\left(\frac{sin\left(11x\right)-11x\cdot cos\left(11x\right)}{11x-sin\left(11x\right)}\right)$

$\frac{dy}{dx}=\left(3t^2+1\right)\:y\left(1\right)=5$

$64\:-\:x^3$