If the solution is based on the definition domain, then the input of the score is still very simple. For example, if we want to enter three-quarters of the number, just press it in the corresponding position? Ctrl+F9？ The shortcut key creates an airspace (a pair of braces). Put the mouse in brackets and type. eq \f(3，4)？ , then right-click and click? Switch domain name code? Command, you can get three quarters of the standard score, as shown in figure 1. Other scores can be imitated. Don't worry about the horizontal line in the score. It automatically adjusts the length according to the length of the numerator and denominator. It should be noted that the domain code must be entered in English half-width state. In addition, the braces can't be entered manually, but can only be completed by shortcut keys.

Second, the score with the root sign.

Let's start with a simple digital input, such as three twos. Or press first? Ctrl+F9？ Shortcut key, and then enter the domain code with braces? eq \r(3，2)？ , select the number in the code? 3? , reduce its font size, and then press? In the right-click menu. Switch domain name code? Command, you can get the cubic square root of this number.

Enter the special domain code in WPS.

Obviously, if you want to get the quadratic root, just put the number in the code? 3? Change to? 2? Do it. However, usually our habit is the number of quadratic roots? 2? Ignored and not written, then we can also directly omit the first number in the domain code and write the code directly? eq \r(，2)？ Do it.

As for the fraction with the root sign, it's very simple. Combine the score with the radical code and change it in the corresponding position. So the field code of a number like two-thirds root two should be? eq \f(\r(3，5)，2)？ . News? Switch domain name code? After that, the effect is ok.

Third, input vector symbols.

The vector symbol is the arrow symbol above the English letters. This requirement can also be easily realized by domain functions.

Enter the domain code in braces? eq \o(？ ，a)？ , where you can use the arrow symbol? Insert? Symbol? In order to achieve this. What if we click the right-click menu at this time? Switch domain name code? Command, you will find that the result is only the overlap of arrows and letters, which is not what we want. So, how do you move the arrow up?

Select the arrow in the field code, right-click, and then click? Font? Command, open? Font? Dialog box. Click? Character spacing? Tab, and then click? Location? Drop-down list, select? Rising? And use the following? Pounds? The spin button sets the lift value to? Five pounds? , as shown in Figure 3.

After confirmation, the arrow symbol can be moved up by 5 points to move it above the character. Now, select the domain code again, and then click? Switch domain name code? Command, you can get the desired effect.