Answers
remove the ( ) fast and then add the numbers that look the same.
(22+19b)+7
22+19b+7
22+7+19b
= 29+19b
18+(5+6m)
18+5+6m
= 23+6m
here u don't care about same or not same u just multiply or divide
11s(4)
= 44s
10y(7)
= 70y
(9+31+5)(7times5)times4)
(45)(35)4
(1575)4
= 6300