ANSWER

EXPLANATION
To find the expression that is equivalent to

we need to simplify it.
We convert the mixed numbers to improper fraction as follows.

This will give us,


We multiply the expression in the parenthesis on the right hand side to obtain,

We share the exponent for the numerator and the denominator separately.

This simplifies to,

We write the final answer as a mixed number to obtain,
I think it would be 710 because you can round the 302 to 300 and then 412 to 410 and then you add the but it asks to estimate so it would probably be 700 <span />