$\csc\left(a\right)^4\left(1-\cos\left(a\right)^4\right)$

$\int\frac{x^2-2x+3}{x\left(x^2+2x+2\right)^2}dx$

$\left(4\right)x\left(-9\right)x\left(-10\right)x\left(3\right)$

$\frac{8m^9n^2-10m^7x^4}{2m^2}$

$\left(1+y^2\right)\frac{d^2}{dx}\left(y\right)=0$

$2y+5b+3b$

$\sin\left(x+\pi\right)-\sin\left(x\right)+1$