$$tan\left(x\right)=19$$

$$\left(4x+5\right)\left(x+3\right)$$

$$\frac{\left(\csc\left(x\right)-sin\left(x\right)\right)}{tanx}$$

$$\lim_{x\to0}\left(\frac{9+7\sqrt{7}}{\sqrt{7}}\right)$$

$$x2+2x+47$$

$$abad$$

$$8+3\cdot5^2-7^2$$