$\left(\csc^2\left(x\right)-1\right)sinx=cot\left(x\right)cos\left(x\right)$

$x^2\:+\:40x$

$\frac{-4x^5+x^3+2x^2-3+1}{x+1}$

$\frac{d}{dx}\left(\frac{x^4\left(x-9\right)^2}{\left(x^2+5\right)^3}\right)$

$\frac{d^2}{dx^2}\left(9x^3-8x^2-50\right)$

$\frac{dw}{dt}+\frac{1}{2t}w=-\frac{1}{2t^2}$

$0.56+-3.07$