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- 多元一次方程组识别及求解。能够识别如“2x+y+z=4”之类格式的方程组，自动判别未知数及系数，并对未知数求解。-Multiple time to identify and solve equations. Able to identify as " 2x+ y+ z = 4" format, like equations, and automatically determine the unknown coefficients, and the unknown solutio