$$\lim_{x\to-3}\frac{x}{\sqrt{x^2-9}}$$

$$\int x^{12}dx$$

$$3+7\left(5\right)$$

$$7-8+4-10-6-5-9$$

$$-6^1$$

$$m^2-11m+30\left(m-6\right)$$

$$\frac{\sec^2x\csc\left(x\right)}{\sec^2x+\csc^2x}=\sin\left(x\right)$$