?a;
?b;
!!('Sum:              a+b=',a+b);
!!('Difference:       a-b=',a-b);
!!('Product:          a*b=',a*b);
!!('Integer quotient: a\b=',a\b);
!!('Remainder:        a|b=',a|b);
!!('Exponentiation:   a^b=',a^b);