$$x+3>-2$$

$$\log\left(5x\:+\:3\right)=\:\log\left(2x-1\right)$$

$$\sqrt{xy^2}\cdot\sqrt{x^3y^7}$$

$$-6\left(6x+6\right)+14x$$

$$\:\frac{5sin^2t}{tan^2t}=\:5\:cos^2t$$

$$\left(\frac{6x^3y^{-2}z^2}{3x^{-2}y^0z^3}\right)^{-2}$$

$$\frac{7}{\sqrt{7}}$$