Answer
519,821 million messages
Work Step by Step
$2018-2000=18$
$f(x)=2158x^2-10339x+6731$
$f(18)=2158*18^2-10339*18+6731$
$f(18)=2158*324-186102+6731$
$f(18)=699192-179371$
$f(18)=519821$
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