Алгебра 7 класс 1. ( а² - 2а ) + ( 3а - 1 )=
2. ( 2у² - 8 ) + ( у + 2 )=
3. ( 1 - b ) - ( b - 2b² )=
4. ( 5x² - 2 ) - ( 3x² - 4x )=
2. ( 2у² - 8 ) + ( у + 2 )=
3. ( 1 - b ) - ( b - 2b² )=
4. ( 5x² - 2 ) - ( 3x² - 4x )=
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