example9 := (95-67*x^2-62*x*y+70*x+93*y^2+74*y)/(49+65*x^2-10*x*y+11*x-56*y^2-
y)*((-27*x+88*y-63)/(61*x+46*y-36))^(1/2)*exp((1-76*x^2-22*x*y-55*x-34*y^2+52*
y)/(6+87*x^2+11*x*y-11*x+88*y^2+94*y));