I see 
[here](https://tex.stackexchange.com/questions/734852/how-can-i-make-scheme-to-typeset-the-addition-of-two-polynomials/734858?noredirect=1#comment1831879_734858). The answer are using Lualatex, integer coefficients. I am trying with two polynomials with rational coefficients. I use `calcfrac`.


```
\documentclass[12pt,border=3.14]{standalone}
\usepackage{tabularray}
\usepackage{calcfrac}
\UseTblrLibrary{amsmath,
	booktabs,
	counter,
	diagbox,
	siunitx,
	varwidth}
\begin{document}
  \begin{tblr}{
			cells={mode=dmath,halign=r},
			hline{Y} = {solid,blue},
			colsep = 0.5mm
		} 
		\SetCell[r=2]{fg=magenta}+ &\calcfrac{3/2} x^6&+&456 x^5&-&\calcfrac{1/3}x^4&+&\calcfrac{7/9}
   x^3&+&\calcfrac{6/7} x^2&+&89 x \\
	&\calcfrac{2024/2025} x^6&{}&{}&+&\calcfrac{5/7}x^4&+&\calcfrac{12345/6789} x^3&-&x^2&+&x&+&34\\
&\calcfrac{3/2 + 2024/2025} x^6&+&456 x^5&+&\calcfrac{-1/3 +5/7}x^4&+&\calcfrac{7/9 + 12345/6789}
   x^3&-&\calcfrac{(1-6/7)}x^2&+&90 x&+&34
	\end{tblr}   
\end{document} 

```
![image.png](/image?hash=2db0effaeab5ed701d755a383e44034e86eb8b5c054b5aac227be9d0a5cb55c1)

How can I make scheme only by input coefficients like [this answer](https://tex.stackexchange.com/questions/734852/how-can-i-make-scheme-to-typeset-the-addition-of-two-polynomials/734858?noredirect=1#comment1831879_734858) without using LuaLaTeX?