How to use the @mathigon/hilbert.Expression.parse function in @mathigon/hilbert
To help you get started, we’ve selected a few @mathigon/hilbert examples, based on popular ways it is used in public projects.
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mathigon / textbooks / content / sequences / functions.ts View on Github 
export function payItForward2($step: Step) {
const $equation = $step.$('x-equation') as EquationSystem;
const close = Expression.parse('3^n');
$equation.validate = (expr: ExprElement) => {
if (Expression.numEquals(expr, close))
return {error: 'pay-it-forward-close'};
};
}@mathigon/hilbert
JavaScript expression parsing, MathML rendering and CAS.
