
Latex !
Can't wait for LaTex to be restored.
I won't ask the reason for the delay.
Here is some totally useless information . . .
Some commands still work:
[tex]12x^3[/tex]. . . . . $\displaystyle 12x^3$
[tex]{5\choose3}[/tex] . $\displaystyle {5\choose3}$
[tex]\log x[/tex] . . . . . $\displaystyle \log x$
[tex]\ln x[/tex]. . . . . . . $\displaystyle \ln x$
[tex]e^x[/tex] . . . . . . . .$\displaystyle e^x$
[tex]10^x[/tex] . . . . . . $\displaystyle 10^x$
[tex]\sin^2x[/tex] . . . . $\displaystyle \sin^2x$
[tex]\sin^{1}x . . . . . . $\displaystyle \sin^{1}x$
Since [tex]x + y[/tex] doesn't work . . .
. . I assumed that only monomials can be used.
However, [tex]12x^2y^3[/tex] doesn't work either.
And [tex]2x = 6[/tex] works!
Go figure!

This is a known issue. See here and here. There are workarounds, albeit somewhat clunky ones. They're mentioned in those two links.