`2x^6 - 3/2 x^2 + 7x^3 -x^5 + 2 + 7/2 x^2 - 6x^3 -2x^6 +x^5`
`=(2x^6 - 2x^6 ) + (-x^5+x^5) + (7x^3-6x^3) +( -3/2 x^2 + 7/2 x^2 )+2`
`=x^3 + 4/2 x^2 +2`
\(2x^6-\dfrac{3}{2}x^2+7x^3-x^5+2+\dfrac{7}{2}x^2-6x^3-2x^6+x^5\\ =\left(2x^6-2x^6\right)+\left(-\dfrac{3}{2}x^2+\dfrac{7}{2}x^2\right)+\left(7x^3-6x^3\right)-x^5+2\\ =2x^2+x^3-x^5+2\)