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This appears to be a medical formula used for calculating creatinine clearance (CrCl), a measure of kidney function. The formula uses the age and weight of the patient, as well as the serum creatinine level, to determine the estimated glomerular filtration rate (eGFR). The text provides the equations for this calculation, which involve multiplying the patient's age (in years) minus 140 by their weight (in kg), and then multiplying the serum creatinine measurement (in mg/dL) by 72. The resulting products are then divided by 1,000, and multiplied together to give an estimated creatinine clearance value in ml/min.*