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Упростите выражения:

1) 0,3(1,2x - 0,5y) - 1,5(0,4x +y)
2) -2,4(2,5a - 1,5b) + 0,5(1,8b + 5,6a)
3) - 1,8(3,5m - 5) - 6,5(0,8 - 0,4m)
4) [tex] \frac{4}{9}(1 \frac{1}{2} c - \frac{3}{8}) - (1 \frac{5}{6} - 1 \frac{1}{3} )[/tex]
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