code: function(x) { 
                  var p = x.power.toString(),
                      m = x.multiplier.toDecimal(), 
                      s = x.toUnitMultiplier().toLinear();
                  if(Number(p) === -1) {
                      return _.multiply(new Symbol(m), _.symfunction(LOG, [s]));
                  }
                  return _.parse(format('({0})*({1})^(({2})+1)/(({2})+1)', m, s, p));
              }
docs: simple integration of a single polynomial x^(n+1)/(n+1)