Subtraction,Multiplication and Addition

1) a.287+395   b.587+976   c.1056+3290   d.9498+4560   e.14897+32968

2) a.14×27   b.17×32   c.28×37   d.39×60   e.92×14   f.125×38

3) a.987-456   b.456-678   c.1056-4657   d.4321-3456   e.13498-112143