$$2\frac{1}{4}\cdot12$$

$$\left(x^2+2\sqrt{2}\right)\left(x^2-\:2\sqrt{2}\right)$$

$$4m+-4m^2+-8m+3m$$

$$18\cdot60$$

$$\frac{dy}{dx}=-\frac{7}{5}x^2+x+\sqrt{x}$$

$$\frac{3x^2+8}{4}+5<6x^2+\frac{12}{5}$$

$$-3\left(x-12\right)\ge\:24$$