XOR gateway expression

I have process with multiple approvals. Manager approval i had to give condition in XOR  that the tasktype is modified and particular field is changed then it should go to   Admin approval.Otherwise it should skip the Admin flow. i have given this condition in XOR:

 if  = and(pv!approved,or(pv!tasktype=con!MODIFY_TASK,pv!segemnt.serviceDate - true -goto-AdminApproval,

Else if =pv!approved-true-go to join

else if no rules are true - go to - accontant.

Thanks 

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