example11 := (-2+43*x^2+58*x*y-84*x+78*y^2-12*y)/(-45-45*x^2-85*x*y+58*x-62*y^
2-77*y)*((45-34*x^2+94*x*y+67*x+95*y^2-38*y)/(-11-99*x^2-80*x*y+42*x+86*y^2+7*
y))^(1/2)*exp((-38+4*x^2-89*x*y-54*x-81*y^2+22*y)/(-56-50*x^2-75*x*y+11*x+80*y
^2+14*y));