Engineer Calculator

The actual formula expression calculator.A fully featured scientific calculator which looks and operates like the real thing.It is made for General engineering and field use.New Feature.1.Display the results as square root if possible.2.Add menu item for displaying result. - Display root, fraction and real number : menu key -> Calculator setting -> Display result.- Display real number only : menu key -> Calculator setting -> Display result.3.Add menu button on title for android devices that dont have hardware menu key.4.Differentiation function.- Example: f(3)(log t) f(3)(sin(t) cos(t))Features.1. The natural formula expression.2. Move the cursor by the touch.3. Use and saving of functions and variables.4. Fraction and mixed fraction feature.-Long press the fraction button for mixed fractions.5. The calculation results is expressed as a fraction.-If the result can be expressed with a fraction, the results will be displayed as a fraction.7. Equation mode.- Long press of