You can
put this solution on YOUR website!
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Trying to decipher what this is suppose to be, I came up with:

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(x^2 - y^2) is the difference of squares and
(x-y)^2 is (x-y)(x-y) so we can write it:
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Cancel pairs of x-y and x+y and we are left with:

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Hope this is what you had in mind, the way it was displayed made no sense.