1) m² - 2m - 8) - (m² + 5m + 9) ,якщо m = 1/7 .
2) 7a² - (3ab - 2a²) + (4ab - 9a²) ,якщо a = - 1/8 , b=-32.
Сделайте пожалуйста, побыстрее если можно)
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