9*(21-8)= 9*21-9*8= 117
31*(25-9)=31*25-31*9=496
(40-29)*12=40*12-29*12=132
(51-15)*19=51*19-15*19=684
8*(19-3)=8*19-8*3 =128
(62-3)*6=62*6-3*6= 354
ИЛИ
9*(21-8)=13*9=117
31*(25-9)=16*31=496
(40-29)*12=11*12=132
(51-15)*19=36*19=684
8*(19-3)=16*18=128
(62-3)*6=59*6=354