example2 := (-64-17*x^2+25*x*y+91*x+98*y)/(44+64*x^2-90*x*y-60*x-34*y^2-13*y)*
exp((-72-2*x^2+71*x*y-47*x-39*y^2-53*y)/(65-97*x^2+33*x*y+10*x+7*y^2-89*y));