Press and hold down the Control key. Copy from here and paste it in your Facebook page. ² and then press Ctrl and C simultaneously to copy it.
Using Insert Symbol Dialog.
Alternatively select the symbol printed above then press CtrlC to copy. Math courses also include a palette of symbols where you can enter the special characters by selecting a palette icon. Input LaTeX Tex AMSmath or ASCIIMath notation Click icon to switch to ASCIIMath mode to make formula. Alternatively just use the copy button at the beginning of.