I tried the following:
⇒
but I get $⇒$\implies
but I get $\implies$\Rightlongarrow
but I get $\Rightlongarrow$
\Rightarrow
, I think--I use this online equation editor when I don't know what TeX to use.
Also, just because \xxx
shows up as [\xxx?]
doesn't mean it's wrong, just that Google Charts doesn't know what to do with it.
It's \Rightarrow
: $\Rightarrow$.