$72abc^2-3abc^2+13xyz$

$3\left(\frac{1}{3}\right)^2+2\left(\frac{1}{3}\right)+1$

$\int\frac{x^2}{\sqrt{144-x^2}}dx$

$3\left(x-2\right)^2-\left(2-x\right)^2$

$\frac{20}{2x}$

$\frac{d}{dx}\left(x^3\sin\left(y^2\right)+y^2\cos\left(x^3\right)=1\right)$

$\int_2^5\left(\frac{1}{ln\:x}\right)dx$