This is a soft keyboard that is convenient for writing mathematical questions and expressions etc.
Numbers symbols all alphabets and Greek letters can be entered without conversion.
You can enter digits from 0 to 9 and all alphabets Greek letters "α β θ λ μ π σ ω" and mathematical symbols "!?√#|%$°'"^:;∠⊥△∴∞∫&+±-~*×/÷=≠≒≡<≦>≧({[)}].".
If you press the key of the symbol continuously it switches to a different symbol.
If you press the key of the alphabet and Greek letters continuously it switches from lowercase letters to uppercase letters.
The alphabet is a QWERTY array.