вычислите значение выражения (отдельно расписать по действиям)
1) 18[tex]\frac{5}{12 }[/tex] - [tex]\frac{7}{12}[/tex] * 1[tex]\frac{19}{21}[/tex] - [tex]\frac{17}{72}[/tex] * [tex]\frac{2}{3}[/tex]
2) (-1,42 - (3,22)) : (-0,4) + (-6) * (-0,7)
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