(y+4)²-(y-2)(y-3)

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(y+4)²-(y-2)(y-3)
(y+4)²-(y-2)(y-3)

(y+4)²-(y-2)(y-3)
(y+4)²=y²+8y+16
(y-2)(y-3)=y²-5y+6
综述,(y+4)²-(y-2)(y-3)
8y+5y+16-6=13y+10