(√5 - √3) / (√45 - √27) = (√5 - √3) / (3(√5 - √3) = 1/3
61 / (16 + 4∛3 + ∛9) + ∛3 =
= (61 + ∛3(16 +4∛3 + ∛9) / (16 + 4∛3 + ∛9) =
= (64 + 16∛3 +4(∛3)² + ∛3 ×∛9) / (16 + 4∛3 + ∛9) =
= (61 + 16∛3 + 4∛9 + 3) / (16 + 4∛3 + ∛9) =
= (∛9 + 4∛3 + 16) / (16 + 4∛3 + ∛9) = 1