It will be understood that alternate calculations, yielding substantially similar results, such as MA=OA*, could be used if found to be more efficient on {HEAD ~ the particular computer system} being employed to perform {TAIL ~ the calculations} 
employed to perform
It will be understood that alternate calculations , yielding substantially similar results , such as MA = OA * , could be used if found to be more efficient on { HEAD ~ the particular computer system } being employed to perform { TAIL ~ the calculations }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL