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assertNear(Math.log10(2), 0.3010299956639812); assertNear(Math.log10(7), 0.8450980400142568); assertNear(Math.log10(Math.E), Math.LOG10E); for (var i = -10; i < 10; i++) assertNear(Math.log10(Math.pow(10, i)), i); reportCompare(0, 0, 'ok');