a)-1/2-2/3-2,5-0-2/3-0,35=
=-1/2-4/3-5/2-35/100=
=-6/2-4/3-7/20=
=-3-(4*20+7*3)/60
=-3-(80+21)/60=-3-101/60=-4intreg 41/60
b)-3/4-2/3-21/4-0-3/2-0,35=
=-(3+21)/4-(2*2+3*3)/6-7/20=
=-24/4-15/6-7/20=-6-5/3-7/20=
=-6-(5*20+7*3)/60=-6-(100+21)/60=
-6-121/60=8intreg 1/60
