$+\left(-3\right)\cdot\left(-11+2\right)+3$

$log\left(\frac{x^2}{4\sqrt{x+1}}\right)$

$\frac{dy}{dx}=\tan\left(x\right)+\cos\left(x\right)$

$\cos=50$

$x\sqrt{1+y^2}+y\:\frac{dy}{dx}\left(x\right)\:\sqrt{1+x^2}=0$

$\left(xy^2-4x^2y^3+5x^3y+4x^2\right).\left(-2x^3y\right)$

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