(-2+1ц7\12)+(3\8-1\6)•4ц1\3
(-2+7\12ц)+(0,375-1\6)•4ц:3 = -2+7\12ц+(3\8-1\6)•4ц:3 = -2+7\12ц+5\24•4ц:3 = -2+7\12ц+5\6•1\3ц = -2+7\12ц+5\18ц = -2+31\36ц