Răspuns:
7(8-9•3)•4-7-8b•(6-8)+16b-6•5•19-67(7-a
7(8-27)•4-7-8b•(6-8)+16b-6•5•19-67(7-a)
7(8-27)•4-7-8b•(-2)+16b-6•5•19-67(7-a)
7(8-27)•4-7-8b•(-2)+16b-570-67(7-a)
7(8-27)•4-7-8b•(-2)+16b-570-469+67a
7•(-19)•4-7-8b•(-2)+16b-570-469+67a
7•(-19)•4-7+8b•2+16b-570-469+67a
7•(-19)•4-7+16b+16b-570-469+67a
-532-7+16b+16b-570-469+67a
-1578+16b+16b+67a
-1578+32b+67a
