LP::Expr e,f,g;

   LP::Col p1,p2,p3,p4,p5;

     c = (e  <= f  );

   LP::Constr c;

     c = (e  <= 2.2);

     c = (e  <= 2  );

     c = (e  <= p1 );

     c = (2.2<= f  );

     c = (2  <= f  );

     c = (p1 <= f  );

     c = (p1 <= p2 );

     c = (p1 <= 2.2);

     c = (p1 <= 2  );

     c = (2.2<= p2 );

     c = (2  <= p2 );

     c = (e  >= f  );

     c = (e  >= 2.2);

     c = (e  >= 2  );

     c = (e  >= p1 );

     c = (2.2>= f  );

     c = (2  >= f  );

     c = (p1 >= f  );

     c = (p1 >= p2 );

     c = (p1 >= 2.2);

     c = (p1 >= 2  );

     c = (2.2>= p2 );

     c = (2  >= p2 );

     c = (e  == f  );

     c = (e  == 2.2);

     c = (e  == 2  );

     c = (e  == p1 );

     c = (2.2== f  );

     c = (2  == f  );

     c = (p1 == f  );

     //c = (p1 == p2 );

     c = (p1 == 2.2);

     c = (p1 == 2  );

     c = (2.2== p2 );

     c = (2  == p2 );

     c = (2 <= e <= 3);

     c = (2 <= p1<= 3);

     c = (2 >= e >= 3);

     c = (2 >= p1>= 3);

     e[x[3]]=2;

     e[x[3]]=4;

     e[x[3]]=1;

     e.constComp()=12;

     lp.addRow(LP::INF,e,23);

     lp.addRow(LP::INF,3.0*(x[1]+x[2]/2)-x[3],23);

     lp.addRow(LP::INF,3.0*(x[1]+x[2]*2-5*x[3]+12-x[4]/3)+2*x[4]-4,23);

     lp.addRow(x[1]+x[3]<=x[5]-3);

     lp.addRow(-7<=x[1]+x[3]-12<=3);

     lp.addRow(x[1]<=x[5]);

   }

   e[p1]=2;

   {

   e.constComp()=12;

     LP::DualExpr e,f,g;

   e[p1]+=2;

     LP::Row p1,p2,p3,p4,p5;

   e.constComp()+=12;

   e[p1]-=2;

     e[p1]=2;

   e.constComp()-=12;

     e[p1]+=2;

     e[p1]-=2;

   e=2;

   e=2.2;

     e=p1;

   e=p1;

     e=f;

   e=f;

     e+=p1;

   e+=2;

     e+=f;

   e+=2.2;

   e+=p1;

     e-=p1;

   e+=f;

     e-=f;

   e-=2;

     e*=2;

   e-=2.2;

     e*=2.2;

   e-=p1;

     e/=2;

   e-=f;

     e/=2.2;

   e*=2;

     e=((p1+p2)+(p1-p2)+(p1+12)+(12+p1)+(p1-12)+(12-p1)+

   e*=2.2;

        (p1+f)+(f+p1)+(f+g)+

   e/=2;

        (p1-f)+(f-p1)+(f-g)+

   e/=2.2;

        2.2*f+f*2.2+f/2.2+

        2*f+f*2+f/2+

   e=((p1+p2)+(p1-p2)+(p1+12)+(12+p1)+(p1-12)+(12-p1)+

        2.2*p1+p1*2.2+p1/2.2+

       (f+12)+(12+f)+(p1+f)+(f+p1)+(f+g)+

        2*p1+p1*2+p1/2

       (f-12)+(12-f)+(p1-f)+(f-p1)+(f-g)+

        );

       2.2*f+f*2.2+f/2.2+

   }

       2*f+f*2+f/2+

       2.2*p1+p1*2.2+p1/2.2+

       2*p1+p1*2+p1/2

      );