'(= (Counterweight_Plate_Weight ?X) (* 0.2816 (* (Counterweight_Plate_Thickness ?X) (- (* (Counterweight_Plate_Depth ?X) (- (Counterweight_Between_Guiderails_Value ?X) 2)) (- (* 3.5 (- (Counterweight_Plate_Depth ?X) 5)) (* 6 (- (Counterweight_Plate_Depth ?X) 7)))))))