ssss["x:map(int,x.split())"mT"x:[x[i]-x[3] for i in range(3)]"mTu]u]u]["x:(x[1]*(x[5]*x[6]-x[3]*x[8])+x[2]*(x[3]*x[7]-x[4]*x[6])+x[0]*(x[4]*x[8]-x[5]*x[7]))/6"m]