$$\int\frac{\sqrt{49-x^2}}{x^4}dx$$

$$\left(\frac{3}{4}m+\frac{2}{3}n\right)^2$$

$$\int\frac{\left(x-2\right)}{\left(3x-2\right)^2}dx$$

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

$$2y\left(16z^2+25w^6\right)$$

$$3^3-3^2$$

$$5\cdot\left(x^2+3x-2\right)$$