How to use word to type the number in the root sign, the superscript and subscript of Σ, and the superscript and subscript of ∫

How to use word to type the number in the root sign, the superscript and subscript of Σ, and the superscript and subscript of ∫

Select "insert" in word, then select "special symbol", and then select to input symbols such as Σ. After that, select the text to be superscript or subscript, and then click anti key to check the options below
For formula input, you can select object and Microsoft formula editor in insert. If not, please install it
In addition, the method upstairs can also be!