-4(qp+pr)+(4qp+pr) -5(x-2y+1)-(1-3x+4y) 1-3(x-(1/2)y^2)+(-x+(1/2)y^2)-4(qp+pr)+(4qp+pr) -5(x-2y+1)-(1-3x+4y)1-3(x-(1/2)y^2)+(-x+(1/2)y^2)

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-4(qp+pr)+(4qp+pr) -5(x-2y+1)-(1-3x+4y) 1-3(x-(1/2)y^2)+(-x+(1/2)y^2)-4(qp+pr)+(4qp+pr) -5(x-2y+1)-(1-3x+4y)1-3(x-(1/2)y^2)+(-x+(1/2)y^2)
-4(qp+pr)+(4qp+pr) -5(x-2y+1)-(1-3x+4y) 1-3(x-(1/2)y^2)+(-x+(1/2)y^2)
-4(qp+pr)+(4qp+pr) -5(x-2y+1)-(1-3x+4y)
1-3(x-(1/2)y^2)+(-x+(1/2)y^2)

-4(qp+pr)+(4qp+pr) -5(x-2y+1)-(1-3x+4y) 1-3(x-(1/2)y^2)+(-x+(1/2)y^2)-4(qp+pr)+(4qp+pr) -5(x-2y+1)-(1-3x+4y)1-3(x-(1/2)y^2)+(-x+(1/2)y^2)
-4(qp+pr)+(4qp+pr)
=-4qp-4pr+4qp+pr
= -3pr
-5(x-2y+1)-(1-3x+4y)
=-5x+10y-5-1+3x-4y
= -2x+6y-6
1-3(x-(1/2)y^2)+(-x+(1/2)y^2)
=1-3x+3y^2/2-x+y^2/2
=1-4x+2y^2

不晓得