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7/2-(3/2)^2
7/2-9/4
14/4-9/4=5/4
c)0,6×1-1,7×0,3-(0,5)^2
0,6-0,51-0,25=-0,16
d)0,018÷0,3^2+0,3^2-0,033-0,2
0,018÷0,09+0,09-0,033-0,2
0,2+0,09-0,033-0,2=0,057