4а^2-а-16а+4+4а^2+а+16а+4/а × 1/а^2+1
8(а^2+1)/а × 1/а^2+1
8/5^-1=40
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4а^2-а-16а+4+4а^2+а+16а+4/а × 1/а^2+1
8(а^2+1)/а × 1/а^2+1
8/5^-1=40
....................