Here the multiplication of the expression given,

To multiply the expression first we have to multiply the signs negative and negative. We know that negative times negative will give positive.
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Now we will multiply the numbers
and 35.
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Now we will multiply x with x and y with y. We will use properties of exponent. We know that when base is same, we have to add the exponents only. If we have
.
So here x means
.
Multiplying we will get here,

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We have got the required answer here.