Original sentence: In mathematics, the exponential function is the function ex, where e is the number (approximately 2.718) such that the function ex equals its own derivative.The function ex may also be written exp(x), especially when x is an expression complicated enough to make typesetting it as an exponent unwieldy
Edited sentence: Euler's constant, e, is the mathematical constant that is the base of the natural logarithm (approximately 2.71828182846).The application of this function to a value x is written as ex.The exponential function is a function in mathematics that produces as its output the exponentiation of Euler's number (e) by a real input variable.The exponential function is also often written as exp(x), especially when x is an expression complicated enough to make typesetting it as an exponent unwieldy