$$\log\left(0.125\right)m=-2$$

$$9^2\left(\infty\right)$$

$$\frac{-25xy}{15x}$$

$$2x^2-20x+25$$

$$\frac{8a^4-6a^2+12a^3-18a^5}{-4a^2}$$

$$\left(5m+7a^8\right)\left(-4b^4+3n^5-8\right)$$

$$\frac{3}{x^2-1}\le1$$