35/[7/8*(1-2/7)]94/7-4/21)*420(7.08*5/7.08*5)/0.5的简便运算

35/[7/8*(1-2/7)]94/7-4/21)*420(7.08*5/7.08*5)/0.5的简便运算
35/[7/8*(1-2/7)]94/7-4/21)*420(7.08*5/7.08*5)/0.5的简便运算

35/[7/8*(1-2/7)]94/7-4/21)*420(7.08*5/7.08*5)/0.5的简便运算
这题括号等都标错了,看不懂

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