Features
- Basic arithmetic: +, −, ×, ÷, power (^), modulo (%)
- Scientific functions: sin, cos, tan, ln, log, sqrt
- Constants: π, e
- Parenthesized expressions with operator precedence
- Degree/radian toggle for trigonometric functions
- Memory: MC, MR, M+, M−
- Expression history (up/down arrow keys)
- Copy/paste (Ctrl+C / Ctrl+V)
- Light and dark themes