$$\int\frac{x^2+5x+8}{\left(x+4\right)^3}dx$$

$$\sqrt{9xy^3+\left(4y\right)^2xy}$$

$$\int x^2\sqrt{1+4x^2}dx$$

$$8\left(27\right)\left(\frac{2}{9}\right)$$

$$\frac{dx}{dt}=0.6\:-\:\frac{3x}{500}$$

$$3x+2x+6x\left(10\right)$$

$$\left(5y-2\right)\left(5y+6\right)$$