How can we use the output of any expression, function, etc. that MySQL self-evaluates to insert a value in a row?

When inserting a value in a row, we can use any expression, function, etc. to self-calculate the output value. Here is an example to demonstrate it -

mysql> Insert into employee(id, emp_name)Select 1+1, Concat_ws(' ','Gaurav', 'Kumar');
Query OK, 1 row affected (0.04 sec)
Records: 1 Duplicates: 0 Warnings: 0

mysql> Select * from employee;
+------+--------------+
| id   | emp_name     |
+------+--------------+
| 2    | Gaurav Kumar |
+------+--------------+
1 row in set (0.00 sec)

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