I want the answer for the 2nd question on that page
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Step-by-step explanation:
=>(y-1/y)(y+1/y)( y²+1/y²) = ( y²-1/y²)( y²+1/y²)
=> ( y²-1/y²)( y²+1/y²) = ( y⁴ -1/y⁴)
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