$$2x\:>\:4x+14\:$$

$$-3\left(2x\:-4\right)$$

$$9a^5b-12a^2b^3+15ab^2$$

$$8.049+5.364+236\cdot23$$

$$\sqrt{0.1}$$

$$\frac{\tan^2\left(37.5\right)\cdot tan^2\left(7.5\right)-1}{tan^2\left(37.5\right)-tan^2\left(7.5\right)}$$