$\frac{dy}{dx}=\frac{\left(y+x^2e^x\right)}{x}$

$\left(9x^2+4x-11\right)-\left(2x^2-3x+1\right)$

$\lim_{x\to\infty}\left(x^4sin\left(\frac{1}{3x^6}\right)\right)$

$\lim_{p\to0}\left(\frac{\sqrt{x+p}-\sqrt{x}}{p}\right)$

$\:4\:cos\:x\:sec\:y$

$\frac{2x^2}{x^3-3}$

$-6+\left(7-9+2-3+4\right)-7-\left(-9+2+4-3\right)$