Dart #3 typedef
void main() { Operation operation = add; int result = operation(10, 20, 30); print(result); operation = subtract; int result2 = operation(50,40,30); print(result2); int result3 = calculate(100 , 20 , 30 , add); print(result3); } //signature typedef Operation = int Function(int x , int y , int z); int add(int x , int y , int z) => x + y + z; int subtract(int x , int y , int z) => x - y - z; int c..