$\frac{-14x^8y^4}{49^3y^5}$

$\lim_{x\to0}\left(\frac{5x^3}{\sin\left(x\right)-x}\right)$

$\int_2^3e^{2x+3y}dx$

$y=5y$

$\frac{2}{\sqrt{x}}+\ln\left(\cos\left(x\right)\right)+x^3$

$\left(5x^{2}-x-10\right)+\left(9x^{2}-4x+17\right)$

$\lim_{x\to\frac{\pi}{3}}\left(\frac{\left(\pi-3x\right)}{\sin\left(\left(\frac{\pi}{3}\right)-x\right)}\right)$