code: function removeDivisionByOne(node) {
    if (node.op !== '/') {
      return Node.Status.noChange(node);
    }
    const denominator = node.args[1];
    if (!Node.Type.isConstant(denominator)) {
      return Node.Status.noChange(node);
    }
    let numerator = clone(node.args[0]);
  
    // if denominator is -1, we make the numerator negative
    if (parseFloat(denominator.value) === -1) {
      // If the numerator was an operation, wrap it in parens before adding -
      // to the front.
      // e.g. 2+3 / -1 ---> -(2+3)
      if (Node.Type.isOperator(numerator)) {
        numerator = Node.Creator.parenthesis(numerator);
      }
      const changeType = Negative.isNegative(numerator) ?
        ChangeTypes.RESOLVE_DOUBLE_MINUS :
        ChangeTypes.DIVISION_BY_NEGATIVE_ONE;
      numerator = Negative.negate(numerator);
      return Node.Status.nodeChanged(changeType, node, numerator);
    }
    else if (parseFloat(denominator.value) === 1) {
      return Node.Status.nodeChanged(
        ChangeTypes.DIVISION_BY_ONE, node, numerator);
    }
    else {
      return Node.Status.noChange(node);
    }
  }
docs: If `node` is a division operation of something by 1 or -1, we can remove the denominator. Returns a Node.Status object.