$7r=-63$

$\frac{x^2-5}{x-1}$

$1-\sqrt{xy}$

$\lim_{x\to2}\left(\frac{\sqrt[3]{3x+2}-2}{\frac{1}{x}-\frac{1}{2}}\right)$

$\int\frac{2}{4x+3}dx$

$y=e^{4x^2+1}$

$\left(-\frac{1}{2}\left(-\frac{51}{571}-\frac{311}{250}\right)-\frac{2}{3}\right)+\left(\frac{\sqrt{3}}{2}\left(-\frac{51}{571}+\frac{311}{250}\right)\right)i$