$$\frac{x^3+6x-2}{x-3}$$

$$\frac{\left(cotx\right)\left(sin\pi\right)}{secx}$$

$$z^2+56z+720$$

$$\frac{1}{2x+1}+\frac{1}{2x-1}=\frac{12}{35}$$

$$-11m+6+3m-4x-15$$

$$\lim_{x\to\infty}\left(\frac{\sqrt{v^2+1}}{\sqrt[3]{v^3-3}}\right)$$

$$\left(2\sin\phi+\cos\theta\right)^{2}+\left(\sin\theta-2\cos\theta\right)^{2}$$