V^290 19 B^20b/v^200 18 E1b

请输入您的数学问题…… v^290-19-b^20b/v^200-18-e1b

问题

v^{2} 90 - 19 - b^{2} 0 b / v^{2} 00 - 18 - e 1 b

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