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√1 9/16*(-2)2+1,2*5/12=√25/16*4+12/10*5/12=5/4*4+1/2=5+1/2=5 ½
(3/4)-1-(-1 1/3)2:0,9=4/3-16/9:9/10=4/3-16/9*10/9=4/3-160/81=108/81-160/81=-52/81