$\frac{8a^6}{2a^3}$

$\left(\frac{1}{5}a-\frac{1}{3}b\right)\left(\frac{3}{7}a\right)$

$\frac{1}{\sin\left(x\right)^2\cdot\cos\left(x\right)^2}=\sec\left(x\right)^2+\csc\left(x\right)^2$

$\int\cot\left(4x\right)^2dx$

$3\left(2x+4\right)+2\left(x-2\right)$

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

$\frac{dy}{dx}\left(3x^2-2xy+y^2=4\right)$