Write Number in Expanded Form

You will be given a number and you will need to return it as a string in Expanded Form.

For example:

expandedForm(12); // Should return '10+2'

expandedForm(42); // Should return '40+2'

TEST CASES

TEST	RESULT
expandedForm(12)	should return '10+2'
expandedForm(42)	should return '40+2'
expandedForm(734)	should return '700+30+4'