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// Thanks: https://github.com/monolithed/ECMAScript-6
'use strict';
var exp = Math.exp;
module.exports = function (x) {
if (isNaN(x)) return NaN;
x = Number(x);
if (x === 0) return x;
if (x === Infinity) return Infinity;
if (x === -Infinity) return -1;
if ((x > -1.0e-6) && (x < 1.0e-6)) return x + x * x / 2;
return exp(x) - 1;
};
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