$\left(-x^2-3x+6\right)^2\:-\left(3-x\right)^2$

$\left(\frac{2vu^3}{u^2v^3\cdot u^3v^2}\right)^{-5}$

$b^2-121$

$\frac{d^3y}{dx^3}+\frac{3d^2y}{dx^2}-4y=0$

$\left(3m-10a\right)\left(3m+10a\right)$

$\sin\left(x\right)=\frac{\sqrt{\csc^2\left(x-1\right)}}{\csc\left(x\right)}$

$\frac{\cos\left(x-y\right)}{sin\left(x\right)sin\left(y\right)}$