question_answer

What is the product of\[\left( y-\frac{1}{y} \right)\left( y+\frac{1}{y} \right)\left( {{y}^{2}}+\frac{1}{{{y}^{2}}} \right)\]?

A) \[{{y}^{4}}+\frac{1}{{{y}^{4}}}\]               

B) \[{{y}^{2}}+\frac{1}{{{y}^{2}}}+2\]          

C)        \[{{y}^{4}}-\frac{1}{{{y}^{4}}}\]     

D)        \[{{y}^{3}}+\frac{1}{{{y}^{3}}}-2\]