code: function step(equation, symbolName) {
    const solveFunctions = [
      // ensure the symbol is always on the left node
      EquationOperations.ensureSymbolInLeftNode,
      // get rid of denominators that have the symbol
      EquationOperations.removeSymbolFromDenominator,
      // remove the symbol from the right side
      EquationOperations.removeSymbolFromRightSide,
      // isolate the symbol on the left side
      EquationOperations.isolateSymbolOnLeftSide,
    ];
  
    for (let i = 0; i < solveFunctions.length; i++) {
      const equationStatus = solveFunctions[i](equation, symbolName);
  
      if (equationStatus.hasChanged()) {
        return equationStatus;
      }
    }
    return EquationStatus.noChange(equation);
  }
docs: Given a symbol and an equation, performs a single step to solve for the symbol. Returns an Status object.