Build a scientific calculator with standard and scientific modes, calculation history, multiple themes, keyboard support, and smooth button press animations.
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calculatormathkeyboardthemes
Objectives
Implement standard arithmetic operations
Add scientific functions (sin, cos, log, etc.)
Maintain and display calculation history
Support keyboard input for all operations
Create multiple switchable themes
Hints
Use a stack-based approach for expression evaluation
Handle edge cases like division by zero
Add keyboard event listeners for number/operator keys