Dynamic date with dynamic number of days

Hi,

I have a requirement where I want to pass dynamic number in place of <dynamic number> in below expression.
 

toDateTimeOnly(concat(toString(toDateOnly(nowWithDelta(<dynamic number>, "days"))),"T10:00:00"))

This dynamic number is being calculated in below manner - 
 

toInteger(
  (
    (toInteger(
      toDateTime(
        concat(
          toString(
            #{
              ExperiencePlatform.ProfileFieldGroup.profile._acssandboxgdcthree.EventReminders.all(
                currentDataPackField.id == ${supplementalId}
              ).at(0).reminderDate
            }
          ),
          "T00:00:00.000Z"
        )
      )
    ))
    -
    (toInteger(
      toDateTime(
        concat(
          toString(
            toDateTimeOnly(
              toDateOnly(now())
            )
          ),
          ".000Z"
        )
      )
    ))
  ) / 86400000
) - 14

I tried merging these two like this -
 

toDateTimeOnly(concat(toString(toDateOnly(nowWithDelta(

toInteger(
  (
    (toInteger(
      toDateTime(
        concat(
          toString(
            #{
              ExperiencePlatform.ProfileFieldGroup.profile._acssandboxgdcthree.EventReminders.all(
                currentDataPackField.id == ${supplementalId}
              ).at(0).reminderDate
            }
          ),
          "T00:00:00.000Z"
        )
      )
    ))
    -
    (toInteger(
      toDateTime(
        concat(
          toString(
            toDateTimeOnly(
              toDateOnly(now())
            )
          ),
          ".000Z"
        )
      )
    ))
  ) / 86400000
) - 14

, "days"))),"T10:00:00"))

However, it gives error - 

The expression is invalid : You cannot use the word 'toInteger' like this because it is a keyword of the language. Please, add quotes to fix your expression.

Can somebody help me understand if there’s any workaround to get my code working?

​@Pulkit_Jain_  ​@Jennifer_Dungan ​@AutumnE ​@Nick_Hilton ​@ktronolone ​@ChristianeRo1