$$\frac{5x^3-2x+6}{x-4}$$

$$\left(2x\:-\:40\right)\left(3x\:+\:60\right)$$

$$8x-3y-9x+5y-2x+y$$

$$^{12}\sqrt{\left(2^6\right)}$$

$$\frac{dy}{dx}+2y=x^3y^3$$

$$-\frac{6}{5}-\frac{2}{3}v+\frac{4}{15}+\frac{1}{3}v$$