$\int\left(x+5\right)e^{3x}dx$

$\lim_{x\to-2}\left(x^3-5x^2+1\right)$

$\frac{d}{dx}\left(x^2+\sin\left(x\cdot y\right)=5+x\right)$

$\frac{d}{d\cdot6}\left(\frac{1}{6}\right)$

$\left(\frac{3}{4}x^3+\frac{5}{3}x^2+\frac{6}{5}-\frac{1}{2}x^2\right)+\left(\frac{3}{2}x^3+\frac{8}{3}x^5+\frac{5}{3}-3x^3\right)$

$\left(n^2+9n-3\right)\left(-4n+9\right)$