1.   -14       return
     +17
     + 3
This problem could also be written -14 + (+17) where the first  + mean addition and the second one means the sign of the number.  Mathematicians being notoriously lazy  would write this problem as
-14 + 17 = 3  The positive sign  with the 17 and 3 are understood to be there.  Try this problem

-27 + 56 =      answer