x+1分之1-x+1x+1分之x的平方+3x+2.x的平方-4分之1,其中x=3
﹙ 1-x﹚/﹙x+1﹚+﹙x²+3x+2﹚/﹙x+1﹚×﹙x²-1/4﹚
=﹙1-x﹚/﹙x+1﹚+﹙x+2﹚×﹙x²-1/4﹚
=﹙1-3﹚/﹙3+1﹚+﹙3+2﹚×﹙9-1/4﹚
=42.25