Integral of $$$x^{4}$$$

Apply the power rule $$$\int x^{n}\, dx = \frac{x^{n + 1}}{n + 1}$$$ $$$\left(n \neq -1 \right)$$$ with $$$n=4$$$:

$${\color{red}{\int{x^{4} d x}}}={\color{red}{\frac{x^{1 + 4}}{1 + 4}}}={\color{red}{\left(\frac{x^{5}}{5}\right)}}$$

Therefore,

$$\int{x^{4} d x} = \frac{x^{5}}{5}$$

Add the constant of integration:

$$\int{x^{4} d x} = \frac{x^{5}}{5}+C$$

$$$\int x^{4}\, dx = \frac{x^{5}}{5} + C$$$A