$$\left(-5ab^2\right)^3$$

$$3^5\cdot\left(-4\right)^{-10}$$

$$\frac{d}{dx}\left(9^x\log\left(9\right)^x\right)$$

$$\sqrt[3]{\frac{125\cdot8}{125}}$$

$$w^7w^{-7}$$

$$\left(x+y-4\right)dx+\left(x+y+2\right)dy=0$$

$$4-\left(+40\right)$$