2t/z−t/2z, если t=22,12−10,47, а z=55−52,5

2t / z - t / 2z = 4t / 2z - t / 2z = 3t / 2z

(3 * (22.15 - 10.47)) / (2 *(40 - 37.5)) = (3 * 11.68) / (2 * 2.5) =  35.04 / 5 = 7.008