That's my question, HattoriHanzo is my name on Reddit. I tried reaching him a year ago when that happened. But sadly, nothing came of it. It's not my fault everyone else wants to know :/ I still use and suggest other to use WA against my better judgement.
Looking at the Android app page, they may have gotten confused because the screenshot has WA in it. That is, it's using your app to input math symbols into WA. That may have triggered a simple policy of "issue takedown for anything that is not ours that has WA in it."
The app Stephen listed isn't mine. You won't find it in the market because it's "suspended". It was literally a fork of the system keyboard with the symbols page having math related symbols.
Worse. According to the Market blurb, it goes further:
"Bonus:
Launcher icon opens a quick dialog box with input box to query the WolframAlpha Computational Knowledge Engine and launch your web browser.
*Wolfram Alpha is a trademark of Wolfram Alpha LLC"
