-2,3*4c= -0,9b*(-0,6)= -5a*3,6b= -8x*(-0,5y)*0,6m= -8/21z*(-m)*7/24= 2 2/7m*(-21/64n)=
-2,3*4c=-9,2c -0.9b*(-0.6)=0,54b -5a*3.6b=-18ab -8x*(-0.5y)*0.6m=2,4xym -8/21z*(-m)*7/24=1/9zm 2 2/7m*(-24/64n)=-6/7mn