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I like the idea, however my first question was a bit confusing (not the math!):

"2x - 2 + -1x + 2 = 5x2 - 4"

Is it necessary to use 'x' for multiplication? It's a bit confusing to be solving for x and have multiplication be represented as x as well.

I clicked through a few more questions and found this:

"-4x - 3 = -3x + 3 - -9xx2 - 9"

Can you use a '*' to represent multiplication?

Oh, it sounds like the javascript font rendering isn't working for you. Do you have JavaScript disabled?

You are correct. I had allowed math.ly in NoScript but not the additional sites. Fixed. Thanks

Ah! I'll move those JavaScript files to the Math.ly domain soon to fix that problem for users that might have the same issue. Good insight. Thanks!