1pub fn add(x: i32, y: i32) -> i32 { 2 return x + y; 3} 4 5pub fn subtract(x: i32, y: i32) -> i32 { 6 return x - y; 7} 8 9pub fn multiply(x: i32, y: i32) -> i32 { 10 return x * y; 11} 12 13pub fn divide(x: i32, y: i32) -> i32 { 14 return x / y; 15}