$$3x^2+2\cdot2x^2+3x$$

$$\left(x^2-x-3\right)^2$$

$$x^{\frac{9}{6}}$$

$$\int\left(\frac{x}{3}+40\right)^4dx$$

$$\left(2m^5+n^5\right)^3$$

$$\int\frac{1}{x^5-x}dx$$

$$\frac{\sec\left(x\right)}{cos\left(x\right)}-\frac{tan\left(x\right)}{cot\left(x\right)}$$