using uCalcSoftware;

var uc = new uCalc();
var t = uc.NewTransformer();

// Variables are {etc} and {ch}
// Anchors are "This", either "a small" or "an easy", and "Test"

t.FromTo("This {etc} {ch: a small | an easy } Test", "<{etc}> ({ch}) experiment");
Console.WriteLine(t.Transform("This is such an easy test."));