# MathJax doesn't render dynamically... Why not? [duplicate]

When I post this:

\sum_{n=0}^\infty\binom{n}{k}x^n=\frac{x^k}{(1-x)^{k+1}}\tag{1}

... all I see is string of code, not the nifty looking math symbols.

When I post the above to a test site, however, it renders just fine. And I can see all of the math just fine on the math.stackexchange forum.

The only problem is when I'm inputting the question. I don't know what the above will look like when I post it.

Is there something I can do to correct this?

Thanks.

• Now that the question has posted, it still looks like gobbledeegook to me. Sep 4 '15 at 23:51
• You need to learn to compile code in your head.
– Asaf Karagila Mod
Sep 5 '15 at 0:00

You need to add some $to the code. • Perfect! I tried it and it worked! Thanks so much. I'm glad it was a simple solution. I added the symbol to the front and back:$\sum_{n=0}^\infty\binom{n}{k}x^n=\frac{x^k}{(1-x)^{k+1}}\tag{1}$Sep 4 '15 at 23:56 • That's the most capitalistic solution possible. Something doesn't work? Throw a bunch of$'s onto it, and it works!