Question 332459
{{{y^4+6y^2+25}}}
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{{{(y^4+10y^2+25)+(-4y^2)}}}
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{{{(y^2+5)^2-(2y)^2}}}
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{{{(y^2+5+2y)*(y^2+5-2y)}}}
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{{{(y^2+2y+5)*(y^2-2y+5)}}}