$\frac{d}{dx}x^2-2xy=-2$

$1\sqrt{x}$

$-\left(7-2\right)-\left(-5+7\right)+\left(14-3+12-3\right)$

$\frac{a^2+2a+3}{a+3}$

$\int x\cdot\frac{1}{2x^3}dx$

$\lim_{x\to\infty}\left(x.e\left(1-x^2\right)\right)$

$\int x\left(\frac{19}{\sqrt{x}\left(17-2\sqrt{x}\right)}\right)dx$