$$\lim_{x\to\infty}\left(\frac{-2^x}{3^x}\right)$$

$$-4x+8-x$$

$$-48-\left(-10\right)\cdot\left(-4\right)-\left(-8\right)$$

$$\frac{dy}{dx}=\frac{300-y}{150}$$

$$-2\left(3+m\right)$$

$$x^3y^4\cdot xy^3$$

$$100y^2-100y+25$$