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This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including spache-formula with all npm packages installed. Try it out:

var spacheFormula = require("spache-formula")

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spache-formula v2.0.0

Formula to detect the grade level of text according to the (revised) Spache Readability Formula (1974)

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