Răspuns:
=-(3/7)*5 ×(-3/7)*8 ÷(3/7)*12= -(3/7)*5 ×(3/7)*8 ÷(3/7)*12= -(3/7)*5 ×(3/7)*8 ×(3/7)*-12 = -(3/7)*5+*8-*12 =-3/7
*=la puterea
/=supra(fractie)