$$\sqrt{16x^7}y^{11}$$

$$-\left(3-x\right)dy=-\left(2+y\right)dx$$

$$\int x^3e^{-4}dx$$

$$75^2\cdot6m^4v^5$$

$$\int\frac{y^2-y-5}{y^3+5y^2}dx$$

$$2x+7\ge3x-2$$

$$\int-sen\left(5x\right)\cdot sen\left(cos\left(5x\right)\right)dx$$