Method _exp

src/maths/Parser.js:67–73

()

    }

    _exp() {
        const termNode = this._term();
        const exprNode = this._moreExp();

        //TODO Do not create an 'empty' node where this is added to 0
        return ASTNode.createNode('op_+', termNode, exprNode);
    }

    _moreExp() {
        let termNode;