$sin\left(x\right)sin\left(y\right)dx+cos\left(x\right)cos\left(y\right)dy=0$

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

$\int\left(12x^2+5\right)^2xdx$

$\lim_{n\to\infty}\left(\ln\left(n+1\right)\right)$

$\sqrt{x}\sqrt{x^2}\sqrt{x^3}$

$\frac{d}{dx}\:\:\sqrt{x-1}$