Question

13a2b+3ab;5a2b-b
$13a { }^{2} b + 3b \: 5a {}^{2} b - b$

Answer 1

13a²b+3ab+5a²b-b+13a²b+3b+5a²b-b
=36a²b+3ab+(3b-2b)
=36a²b+3ab+b