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pub mod calculate{
  

  pub fn add(x:i32,y:i32)->i32{
  x+y
  }
 pub fn sub(x:i32,y:i32)->i32{
  x-y
  }
 pub fn divide(x:i32,y:i32)->i32{
  x/y
  }
   pub fn remainder(x:i32,y:i32)->i32{
  x%y
  }
 pub fn multi(x:i32,y:i32)->i32{
  x*y
  }
}
pub use calculate::add;
pub use calculate::remainder;
pub use calculate::divide;
pub use calculate::multi;
pub use calculate::sub;