Subtract the sum of 4x²y - 3xy² + 4 and -3x²y - 7xy² - 7 from x² + 4
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Answer:
4x2y-3xy2+4
(+)-3x2y-7xy2-7
_____________
-1x2y-10xy2-3
=x2+4-(-1x2y-10xy2-3)
=x2+4+1x2y+10xy2+3
=x2+4+3+1x2y +10xy2
= x2+7+1x2y+10xy2
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