a=i/i;c=a+a;d=c+c;
e=d+d;b=b+a;b=b*e;
i=i-a;c=a+a;e=a*a;
d=i/c;i=i-d;i=i-d;
i=i*e;i=i+a;b=b/i;
i=e+c;e=e*i;i=d/c;
d=d-i;d=d-i;d=d*e;
d=d+a;b=b/d;e=b/c;
e=e*c;i=b-e;e=e-e;
e=e/e
