5 5 * ∛4² 5*∛4²
----- = ------------ = -----------
∛4 ∛4* ∛4² 4
∛6 ∛6 * (∛6-1) ∛6 * (∛6²-∛6+1) ∛6 * (∛6²-∛6+1)
-------- = ------------------ -------- = ---------------------- = ---------------------
∛6+1 (∛6+1) * (∛6²-∛6+1) (∛6)³+1³ 7
3 3 * (∛7-1) 3 * (∛7-1) 3 * (∛7-1) ∛7-1
----------------- = -------------------------- = ---------------- = ------------ = ----------
∛49+∛7+1 (∛7²+∛7+1)* (∛7-1) (∛7)³-1³ 6 2