$2x\:+\:2\:=\:88$

$\left(21y-1\right)dx+\left(1+21x\right)dy=0$

$\frac{dy}{dx}=\frac{3}{2}\sqrt{x^3}-2x^5-5x^2$

$\csc\left(x\right)\cdot\sin^3\left(x\right)+\cos\left(2x\right)$

$15x^{3y}^2-20x^{2y}^3+12x^{4y}$

$9.5+-10.6\left(10.9m+-2\right)$

$\lim_{x\to1}\left(\frac{x^2-6x+5}{2x^2-2}\right)$