public static MathStatements.MathStatement ParseOrThrow(string input) => Expr.ParseOrThrow(input);
public static Expr ParseOrThrow(string input) => Expr.ParseOrThrow(input);
public static MathStatements.MathStatement ParseOrThrow(string input) => Expr.ParseOrThrow(input);
public static Expr ParseOrThrow(string input) => Expr.ParseOrThrow(input);