If m and n are integers such that (√2)1934429m8n=3n16m(644)(\surd2)^{19} 3^4 4^2 9^m 8^n = 3^n 16^m (\sqrt[4]{64})(√2)1934429m8n=3n16m(464) then m is
-20
-24
-12
-16
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