2. Simplify to the simplest quadratic root, and the last root cannot have a score.
3. Simplify to the simplest quadratic root, and the denominator cannot have a root sign. So you need to remove the root sign of the denominator.
4. Simplify to the simplest quadratic root, and no factor in the final root number can be a complete square number. So it is necessary to find a complete square number.
5. The complete square number mentioned in the fourth step includes factorial formula.
6. If there are scores similar to 1 and 1/2 under the root sign, convert them into false scores, then add the root sign to the numerator denominator and remove the root sign of the denominator.