2a of 5A ^ 2B + 3b of 10ab ^ 2

2a of 5A ^ 2B + 3b of 10ab ^ 2

2a/(5a²b)+3b/(10ab²)
=4ab/(10a²b²)+3ab/(10a²b²)
=7ab/(10a²b²)
=7/(10ab)
Hope to adopt