$$\cos\left(0\right)+\sin\left(0\right)$$

$$\frac{3x-2}{2x+1}\le4$$

$$120\cdot18$$

$$\left(-2x+1\right)^2$$

$$\int\left(3x^2+x\right)^3dx$$

$$\left(3x\right)\left(6x+6\right)$$

$$\frac{dr}{d\theta\:}=rcos\theta\:+rsin\theta\:$$