Recently,I want to use the 2D graphics that *Mathematica* generates in my paper.My step-by-step operation as below:

    Plot[x^3 + 2 x + 3, {x, -2, 3}]

Then I `click the right mouse button`==> `copy the figure`==>`paste in the word document`

I discover that the graphic rendering denticular.

So my question is `how to extract the high-quatity graphic that Mathematica generates`.

![enter image description here][1]


  [1]: https://i.sstatic.net/hvgmj.png