As a math teacher, I will encounter the work of arranging teaching plans and test papers every day. In this process, it is necessary to frequently and massively input various mathematical symbols, such as Greek letters α and β, or points A and B, line segments AB and CD, or, for example, ∠∥⊥≤≥×÷. Some people may say, with a formula editor? ! In fact, you can quickly enter these letters or symbols without a formula editor. Using the input method to construct some special words, and then using the automatic error correction function of word, you can input these letters or symbols very conveniently and quickly. How to operate? First, use the input method to construct some special words. Such as α, β, big A, big B, big ab, big cd, angle, parallel, vertical, small, equal, unequal, multiplication and division. It is very convenient to construct these words with the extreme five-stroke input method. For example, when you finish recording "big A writing", press the shortcut key "Ctrl+=" and there will be a word prompt you constructed. Then use "↓" and "→" to select the length of the word, then select the custom input code, and enter the input code you use in the prompt box that appears. For example, the word "big A" can be represented by the code of "A capital" in normal reading habits, that is, "adpg". After completing these tasks, you can make full use of the automatic error correction function of word to realize this dream. The method is as follows: Enter the required letters or symbols. For example, enter "α" and set its font format to italic (letters or symbols representing variables in mathematical documents are usually expressed in italic format). Select it with the mouse, and then select AutoCorrect Options from the [Tools] menu options. In the AutoCorrect tab that pops up, select the Format Text option, enter the corresponding word such as "alpha" in the Replace option, and press enter to confirm. In this way, the related letters or symbols will be corrected automatically in turn. Return to the word document, click the Save tool with the left mouse button, and then press the Shift key. In this way, your custom settings will be saved in "Normal.dot", and you can use this function at any time in the future. In a word document, what appears in the document when you enter a special word such as "alpha"? Isn't it amazing?