Answer:
the last one 2x-⁴y⁶
Explanation:
-4 : - 2 = 2
x-³ : x = x-³-¹ = x-⁴
y⁴ : y-² = y⁴-(-²) = y⁴+² = y⁶
final
2x-⁴y⁶
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