-3pe5:0,6+[0,(3)-7pe3]•(0,6)
-3/5 * 6/10 + ( 3/9 - 7/3 ) * 6/10
-10/10 + ( 1/3 - 7/3 ) * 6/10
-1 + (-6/3 ) * 6/10
-1 -36/30
-1 - 6/5
-5/5 - 6/5
-11/5 = - 2,2
