query is executed but operations are not sucess.

create procedure mathopera
(
@c int,
@e int,

@g int,
@i int
)

as
begin
set nocount on

select
(a+b) as c,
(@c-d) as e,
(@e*f) as g,
(@g/h) as i

from maths
end
 

if i entered the values all the operations have to be not performed .any mistake means correct it