We have $ab +5b+2a+10 = ab + 5b+2a + 2\cdot 5$, so we have a straightforward application of Simon's Favorite Factoring Trick: \[ab + 5b+2a+10 = \boxed{(a+5)(b+2)}.\]
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Factor the expression $ab+5b+2a+10$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
(a+5)(b+2)
Factor the expression $ab+5b+2a+10$.
test