$$36x^2-4$$

$$\int\frac{5x+3}{x^2+x+1}dx$$

$$\left(88+8\right)-\left(-8+88\right)$$

$$1.25x=10$$

$$4.5\left(2.25\right)^5$$

$$\frac{d}{dx}\left(-\cos\left(\cos\left(x\right)\right)\sin\left(x\right)\right)$$