July 2022 0 10 Report

Помогите, пожалуйста!

Упростите: 

2(х-1) + 3 (2 - х)

2ав (3-2а) +4в(3а-7а^2)

7м(м-н) - 3 (н +м)

(х-2у) * 2 ху - 28 х^2 у

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