$$\log5\left(\frac{1}{25}\right)$$

$$\cot^4\left(x\right)+\cot^2\left(x\right)=\csc^4\left(x\right)-\csc^2\left(x\right)$$

$$9g+3b+16bg+6b$$

$$5x^3+10x^2-20x+35x^4$$

$$-2-3\left(-8\right)$$

$$\lim_{x\to3}\left(\frac{\sqrt{3x+10}-2}{x+2}\right)$$

$$15x^2+20x+12$$