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Approx. "X" is not a variable.
However, a numerical coefficient can also allow for quite interesting variations.
x3 - a laughing lion?
x3333
x7 - something like disapproval
x777
also, it can be a semi-questioning smiley.
Where "x" is replaced by a numerical coefficient:
8D - presumably, a stupid, amazed laugh.
8DDDD
0) - a cyclops?
0)))
As if hinting that it looks down on everything.
By the way, the case of the constant "x" and the variable "D" is important.
If "D" = d,
then the smiley falls into the "tough luck" category.
Xd or xd
The case of "X" determines the degree of shock.