$$\int\left(\frac{4x+6}{\left(x^2+3x+7\right)^4}\right)dx$$

$$34+x-1$$

$$\lim_{x\to-2}\left(x\sqrt{x+4}\sqrt[3]{x-6}\right)$$

$$\lim_{t\to2}\left(\frac{\sqrt{x}-\sqrt{2}}{x-2}\right)$$

$$-4x^5y^3\left(-2x^2y^2\right)$$

$$\int\frac{x^7}{\left(4-\left(x^4\right)\right)^{\left(2\right)}}dx$$

$$7.75\:+\:-4.25$$