New Features:
✔️ Advanced Calculation Engine - Supports complex expressions with operator precedence
✔️ Memory Functions - M+, M-, MR, MC for storing values
✔️ Calculation History - View previous calculations with the HISTORY button
✔️ Real-time Preview - See results as you type before pressing equals
✔️ Immersive Full-Screen Mode - Maximizes screen space for calculations
✔️ Haptic Feedback - Tactile response for button presses