Look for the symbol in the mobile phone input method, then click the "Math" option in the symbol, and there are three smaller numbers in it, such as 1 2 3, then enter the English m and press enter? It becomes an m? Yes

The squaring process is as follows:

1. Enter the page where you want to insert the symbol. After the cursor stops at the input position, the input method will automatically appear.

2, click on the "symbol", there are several symbol options.

3. Select the Math category and drag it down.

4. You will see the box number and click Insert directly.

The cubic process is as follows:

1. Enter the lowercase "m" first.

2. Click "Symbol" and several symbol options will appear.

3. Select the Math category and drag it down.

You will see the number "3". Click it directly to insert it.