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README.md

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+# Math Expression Evaluator
+
+A simple, interactive math expression evaluator built with Go.
+
+## Usage
+
+Run the program and type your expression into the input field. Press Enter to evaluate.
+
+Examples:
+- `2 + 2`
+- `sin(pi/4)`
+- `pow(2, 8)`
+- `sqrt(64) + 10`
+
+## Dependencies
+
+- [expr-lang/expr](https://github.com/expr-lang/expr) - Expression evaluation
+- [gdamore/tcell](https://github.com/gdamore/tcell) - Terminal handling
+- [rivo/tview](https://github.com/rivo/tview) - Terminal UI components
+
+## Controls
+
+- Enter: Evaluate expression
+- Esc/Ctrl+C: Exit application