Plus ^ sign: \hat{x}
Add a line: \overline{x}
Widen^: \widehat{x}
Add squiggles: \widetilde{x}
Add a dot: \dot{x}
Add two dots: \ddot{x}
The above is in LaTeX, in Word, you only need to replace {} with ()
Plus ^ sign: \hat{x}
Add a line: \overline{x}
Widen^: \widehat{x}
Add squiggles: \widetilde{x}
Add a dot: \dot{x}
Add two dots: \ddot{x}
The above is in LaTeX, in Word, you only need to replace {} with ()