$\frac{6x^2-5x+1}{2x-3}$

$\int\left(e^x\left(5-e^x\right)^5\right)dx$

$\lim_{x\to0}\left(\frac{2x}{x^2+1}\right)$

$\left(-900\right)-\left(-1000\right)$

$\left(3+\sqrt{5}\right)\times\:\left(3-\sqrt{5}\right)+\left(2-4\sqrt{5}\right)\times\:\left(2+4\sqrt{5}\right)$

$y^2\cdot\frac{dy}{dx}+x^2-1=0$

$\left(x^2+1\right)^2-\left(x^2-1\right)^2$