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

$$\int\left(x\cdot\left(2x+3\right)^{10}\right)dx$$

$$-2x+\frac{d^2y}{dx^2}\left(x\right)=0$$

$$-10x+2+26x-34$$

$$\lim_{x\to2}\left(\frac{\tan\left(5x\right)}{\tan\left(3x\right)}\right)$$

$$\frac{45ab3m}{9abm}$$