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Find an antiderivative of:

$$f(x)=(e+\pi ) {x}^{e+\pi }$$

$\cfrac{e+\pi}{e+ \pi-1}{x}^{e+ \pi-1}+C$

$({e+\pi})^{2}{x}^{e+ \pi-1}+C$

$\cfrac{e+\pi}{e+ \pi+1}{x}^{e+ \pi+1}+C$

${x}^{e+ \pi}+C$