Use Negative Exponents Where Necessary to Write the Expression with All

Use negative exponents where necessary to write the expression with all variables in the numerator of a term. That is,
write each term in the form c $c x ^ { n }$ if the term contains a variable.
- $$y = 7 x ^ { 2 } + 5 - \frac { 3 } { x } + \frac { 3 } { x ^ { 2 } }$$

A) $y = 7 x ^ { 2 } + 5 + x ^ { - 1 } + x ^ { - 2 }$
B) $y = 7 x ^ { 2 } + 5 - 3 x ^ { - 1 } + 3 x ^ { - 2 }$
C) $y = 5 - 3 x ^ { - 1 } + 10 x ^ { - 2 }$
D) $y = 7 x ^ { 2 } + 5 - ( 3 x ) ^ { - 1 } + ( 3 x ) ^ { - 2 }$

Correct Answer:

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