# How to write mathematical expressions in questions using android devices? [duplicate]

I posted a question at Physics Stack Exchange site, and I uploaded a photograph of the calculation I had done on that. But, I was asked to write all my calculations in the question(and not in the photograph). So, How to write mathematical expressions in questions using android devices?

MathJax should work on android devices. You'll still be typing out plain text with $ symbols enclosing the math. • To be fair, I think that typing any nontrivial mathematics using the default Android keyboard is a serious hassle --- and I'm an expert at it. – rob Jul 23 '18 at 13:36 • @rob I'm in India, so the keyboard on my phone keeps trying to convince me that I need the rupee symbol instead of $. – user191954 Jul 23 '18 at 13:39
• Hmm €F=ma€ nope, it doesn't work either :-P – AccidentalFourierTransform Jul 23 '18 at 16:02