3*y 2*y ---*y - 4 + --- - 5*y 4 5
2 23*y 3*y -4 - ---- + ---- 5 4
-4.0 + 0.75*y^2 - 4.6*y
2 -80 - 92*y + 15*y ------------------ 20
2*y 3*y -4 + --- + ---*y - 5*y 5 4