$$\int_1^0\left(r^3e^r\right)dr$$

$$\lim_{x\to\infty}\left(\frac{e^{x^5}}{4-x^6}\right)$$

$$\left(\frac{2^{-4}}{2^{-2}-2^{-3}}\right)^{-2}$$

$$5x\left(4x+y\right)$$

$$\frac{3x^3+6x^2-10x+2}{x+1}$$

$$\frac{sec\left(x\right)-csc\left(x\right)}{sec\left(x\right)csc\left(x\right)}$$

$$\left(82\right)^3$$