$limx->0+\left(tan^x\left(1-x^x\right)\right)$

$681+\left(-870\right)+\left(-985\right)$

$\frac{dy}{dx}=4x\ln\left(1-x^2\right)$

$4-8\cos^2\left(5x\right)$

$\lim_{x\to2}\left(x^2+3x-5\right)$

$\left(\frac{3}{4}\right)^{-3}x\left(\frac{9}{8}\right)^2$

$\frac{2y^3-9y^2+11y-6}{y-3}$