Glomerular capillary hydrostatic pressure plus the glomerular capillary osmotic pressure minus the tubular osmotic pressure.

Glomerular capillary hydrostatic pressure plus the glomerular capillary osmotic pressure minus the tubular hydrostatic pressure.

The sum of the tubular and the glomerular capillary hydrostatic pressures minus both the tubular and glomerular capillary osmotic pressures.

Glomerular capillary hydrostatic pressure plus tubular osmotic pressure minus tubular hydrostatic pressure minus glomerular capillary osmotic pressure.