Срочно!
17. Найдите значение выражения
А) 3-²×5-³/15-³
Б)27-²×4-¹/6-⁵
С)81²×6-⁴×21-⁴/14‐⁵
18.упростите
А)2аб-³×5а-²б
Б)3 1/3 а⁵б-¹⁶×0,6а-¹б¹⁸
С)2,4а‐⁵б²÷(0,2а-³б‐2)
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