$$bx+ay=a+b$$

$$\left(4ab+5xy^3\right)^2$$

$$-\frac{1}{3}x^2+9x$$

$$\lim_{x\to1}\left(\sqrt{1-x}\right)$$

$$\frac{\left(\left(20x^{-2.5}\right)+150\right)}{\left(10x^3-25\right)^{-1}}$$

$$\left(x+y\right)^8-\left(x-y\right)^8$$