(7-1又1/3÷4)x[(0.2+1/3)x2/3]

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(7-1又1/3÷4)x[(0.2+1/3)x2/3](7-1又1/3÷4)x[(0.2+1/3)x2/3](7-1又1/3÷4)x[(0.2+1/3)x2/3]↘

(7-1又1/3÷4)x[(0.2+1/3)x2/3]
(7-1又1/3÷4)x[(0.2+1/3)x2/3]

(7-1又1/3÷4)x[(0.2+1/3)x2/3]