$9+-6+-1+4$

$y ^ { 2 } = \frac { x - 1 } { x + 1 }$

$\left(5x^1y^{11}\right)^2$

$\int\left(\left(16x+9\right)\ln\left(2x\right)\right)dx$

$\left(25-5\right)\left(5\right)$

$6\frac{d^2y}{dx^2}-5\frac{dy}{dx}+1y=0$

$\frac{3\sqrt{20}}{\sqrt{5}}-2\sqrt{2}\cdot\:\sqrt{8}$