(4.25- (4.25*7.18-6.18))*0.98
= (4.25-4.25*7.18+6.18)*0.98
= (4.25*(1-7.18)+6.18)*0.98
= ( -4.25*6.18+6.18)*0.98
=(6.18*(1-4.25)*0.98
= -6.18*3.25*0.98
=-19.6833
(4.25- (4.25*7.18-6.18))*0.98
= (4.25-4.25*7.18+6.18)*0.98
= (4.25*(1-7.18)+6.18)*0.98
= ( -4.25*6.18+6.18)*0.98
=(6.18*(1-4.25)*0.98
= -6.18*3.25*0.98
=-19.6833