$\left(\frac{1}{3}x+2y\right)\left(\frac{1}{3}x-6y\right)$

$9y+18$

$x^2-2x-11$

$sin^4\left(y\right)-cos^4\left(y\right)+1=2sin^2\left(y\right)$

$\lim_{x\to2}\left(x\cdot\ln\left(x\right)\right)$

$\left(5-3x\right)\left(8-3x\right)$

$\left(\frac{a^2}{a^2}\right)\left(\frac{a^{-2}}{a^{-5}}\right)$