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→hints for difficult problem
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=hints for difficult problem=
=hints for difficult problem=
If x-= 4 prove that <math>x^{3}+6x^{2}+\frac {6} {x^{2}}-\frac{1} {x^{3}}=184 </math>
=====If x+y=a and xy=b then prove that (1+)+(1+) =
=====If x+y=a and xy=b then prove that (1+)+(1+) =