calcule:
.A.4+6X7-2+44.......................................................
.B.18-2X7-3=11........................................................
.C.6X5-4+9=35......................................................
.D.4+6X7-2=68.......................................................
.E.18-2X7-2=10.......................................................
.F.6X5-4+9=17..........................................................
.G.3+4X7-2=47........................................................