整式乘除(2x+1)²-(x+3)²-(x-1)²+1给个详细的计算过程,

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整式乘除(2x+1)²-(x+3)²-(x-1)²+1给个详细的计算过程,

(2x+1)²-(x+3)²-(x-1)²+1
=4x^2+4x+1-(x^2+9+6x)-(x^2+1-2x)+1
=4x^2+4x+1-x^2-9-6x-x^2-1+2x+1
=2x^2-8