We break all the bracket out :-0.75 + 2/5 + 0.4 - 3/42/5 = 0.4-3/4 = -0.75So, we have : -0.75 + 0.4 + 0.4 - 0.75= (-0.75 - 0.75) + (0.4 + 0.4) = -1.5 + 0.8 = -0.7
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