1 2 3 4 5 6 7 8
result = coeff_dxx_m3*data_m3 + coeff_dxx_m2*data_m2 + coeff_dxx_m1*data_m1 + coeff_dxx_0*data_0 + coeff_dxx_p1*data_p1 + coeff_dxx_p2*data_p2 + coeff_dxx_p3*data_p3;