list(list("(v=root_of(v_**6 + v_ + 1,v_,tag_1)","v=1)"),
     list(list("x= - y","y=(1+f(x, g(h(i,j))))/(1 - f(x, g(h(i,j))))"),
          list("x= - y","y=(1+f(x, g(h(i,j))))**2/(1 - f(x, g(h(i,j))))**2")),
     list(list("q=myfun1(p^2+1,exp(r))", " p=cos(r)", " r=m_y2f(p,r,s)"),
          list("q=m(p^2+1,exp(r))", " p=cos(-r)", " r=m_y2f(d+e)")))
