Evaluate the following indefinite integral: ∫ ((e^x) / ((e^x) +1))dx

Evaluate the following indefinite integral:

∫ ((e^x) / ((e^x) +1))dx

Any and all help is much appreciated! Thanks so much in advance!

Substitution works. Let u = e^x + 1. du = e^x dx. Integral becomes integral of du/u.