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Credit goes to binji.github.io

This is a very simple expression compiler.
You can type in an expression with the following characters (no space!).
Then click the 'compile' button and it will generate a new WebAssembly module,
link it into the original wasm module, and run it.

( ) + - * / 0 1 2 3 4 5 6 7 8 9

Here's the wasm module: