(5 1/3 - (- 2 1/3)^2)) * 1,5 = (16/3 - (- 7/3)^2) *15/10 =
= (16/3 - 49/9) * 15/10 = (144/27 - 147/27) * 15/10 =
= - 3/27 * 15/10 = - 45/270 = - 1/6
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- (1,8 * 1,2)/ (2,7 * 4,8) = - 2,16 / 12,96 = - 216/100 : 1296/100 = - 216/1296 =
= - 1/6
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- 1/6 = - 1/6