$$\int\frac{7t^4-3t^3+5}{5t^2}dt$$

$$\frac{d}{dx}\left(12U^3-4U\right)\left(2x\right)$$

$$\lim_{x\to2}\left(\frac{x^3-3x^2+4}{3x^3-18x^2+36x-24}\right)$$

$$sin\left(9\theta\right)sin\left(6\theta\right)$$

$$x2+x+4x+4$$

$$\left(3ab\:-\:c\right)\left(3ab\:+\:c\right)$$

$$2x^3+3x^2-23x-12$$