Math symbols library per abzXYZ

A simple library of mathematical symbols (such as π, √, ∞, ≈ and more) for quick copying into your clipboard with a press of a button and the ability to create upper and lower index text. Created to help with typing different mathematical operations.
To copy a symbol into your clipboard simply press one of the round buttons or enter text into the small input field at the bottom (labeled "Index") and press one of the two buttons below to move your input to either upper or lower index (note that some symbols from lower index text font are missing).