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2^2-x^2+x^2+6x+9-x=-7
4+5x+9=-7
5x=-7-13
5x=-20
x=-20/5
x=-4
spr.
(2+4)(2-4)+(-4+3)^2=6*(-2)+1=-12+1=-11 L
-4-7=-11 P P=L