$\frac{2}{3}-\frac{-1}{3}$

$\int_0^{\frac{\pi}{2}}\left(\frac{5\cos\left(x\right)}{\sqrt{sin\left(x\right)}}\right)dx$

$8x^3+12x^2-16x$

$\frac{dx}{x^2+1}=-\frac{\cos\left(y\right)}{\sin\left(y\right)}dy$

$\int\csc^2\left(7x+5\right)dx$

$\left(3x-2y+3z\right)^2$

$\frac{dy}{dx}\ln\left(\frac{x}{9+x^2}\right)$