4/y - 2/y-5 + 2(y+5)/(5-y)(5+y)= 4/y - 2/y-5 + 2/5-y= 4/y + 2/5-y +2/5-y= 4/y +4/5-y= (4(5-y)+4y)/y(5-y)= (20-4y+4y)/y(5-y)= 20/y(5-y)
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4/y - 2/y-5 + 2(y+5)/(5-y)(5+y)= 4/y - 2/y-5 + 2/5-y= 4/y + 2/5-y +2/5-y= 4/y +4/5-y= (4(5-y)+4y)/y(5-y)= (20-4y+4y)/y(5-y)= 20/y(5-y)
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