$$\frac{d^2}{dx^2}\left(2y-y\ln\left(y\right)\right)$$

$$\frac{d}{dx}\left(5x-3\right)^3\cdot\left(5x^2+3\right)^3$$

$$\frac{x\:+\:89}{4}=56$$

$$x^2-3x+3$$

$$\left(a+2\right)+\left(a-2\right)$$

$$-13+\frac{-5-7-9}{-7}+\frac{-12}{4}$$