To write the 040007e005f0040007e00290040006300720079002c002000740065006100720073 Sad Symbol Smiley Face symbol on keyboard using ALT codes; ALT+3.0354942532661E+83, just hold down the ALT key while typing the alt key code 3.0354942532661E+83. You have to use the numeric keypad of your keyboard. If you don not have numeric keypad, hold down the Fn and ALT keys while typing the alt code number.