Question

take away
${x}^ {2} - y {}^{2}$

From
$3xy - 4y {}^{2}$
And add the result to the sum of
$4xy - x {}^{2} - 3y {}^{2}$
And
$2x {}^{2} + 6y {}^{2}$

Answer 1

Answer is 7xy.

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