example17 := (-20-28*x^3-90*x^2*y-27*x^2-45*x*y^2+20*x*y-49*x-48*y^3+51*y^2-56
*y)/(-51-77*x^3-5*x^2*y+7*x^2-15*x*y^2+62*x*y-31*x+57*y^3+98*y^2-80*y)*((93+39
*x^2+3*x*y+6*x+60*y^2+17*y)/(-40-80*x^2+88*x*y-40*x-10*y^2+67*y))^(1/2)*exp((-\
37*x+42*y-51)/(-80*x-72*y+36));