/ 2\ \x*y + y /*6*x -------------- 48*x*(x + y)
2 y x*y -- + --- 8 8 -------- x + y
2 6*y + 6*x*y ------------ 48*(x + y)
0.125*(y^2 + x*y)/(x + y)
2 6*y + 6*x*y ------------ 48*x + 48*y
y - 8
2 x*y + y --------- 8*(x + y)