566-b+64 = 630-b
a-10+25 = а+15
734-(y+42) = у-692
(z+123)-18 = z+105
254-n-53 = 201-n
a-78-39 = а-117
566-b+64 = 630-b
a-10+25 = а+15
734-(y+42) = у-692
(z+123)-18 = z+105
254-n-53 = 201-n
a-78-39 = а-117