How to write formula visualizer for android application?

Question

Java

I would like to write a calculator on android for construction calculations with the display of formulas for which the calculation is being carried out.
For example
, the formula itself is written in java result = (a + b + Math.Pi) / b Like
Mathlab Graphing Calculator
was converted on the screen into a formula with fractions, degrees, etc., in general, into a readable form.

Answer 1

Use LaTeX to create formulas and a library to display

Answer 2

MathML ( example )