SC1 = S1*C1 DZ1 = D1*Z1 SC2 = S2*C2 E = S1*D2 G = D1*S2 H = Z1*C2 J = SC1*D2 K = DZ1*SC2 t0 = H+C1 t1 = E+G t2 = t0*t1 t3 = t2-J S3 = t3-K t4 = H+E t5 = C1-G t6 = t4*t5 t7 = t6-J C3 = t7+K t8 = a*SC1 t9 = DZ1-t8 t10 = SC2+D2 t11 = a*J t12 = t9*t10 t13 = t12+t11 D3 = t13-K t14 = H+G t15 = t14^2 t16 = 2*K Z3 = t15-t16