625, 69, 19, 17, ( )括号填多少

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625, 69, 19, 17, ( )括号填多少

625, 69, 19, 17, ( )括号填多少
625, 69, 19, 17, ( )括号填多少

625, 69, 19, 17, ( )括号填多少
5^4+0 4^3+5 3^2+10 2^1+15 1^0+20=21

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