http://server-test.net/math/php.php?name=tokyo&v1=1&v2=2021&v3=1&v4=3&y=2021&n=3

toda1-2021-3.txt

[todai-2021-3]
(x)
1
[
    8 x = (x + 1) (x^2 + 3) /\
    x /= 1
].
finish

出力.txt

$ bin/qepcadd <todai-2021-3.txt 
=======================================================
                Quantifier Elimination                 
                          in                           
            Elementary Algebra and Geometry            
                          by                           
      Partial Cylindrical Algebraic Decomposition      
                                                       
               Version B 1.69, 16 Mar 2012
                                                       
                          by                           
                       Hoon Hong                       
                  ([email protected])                
                                                       
With contributions by: Christopher W. Brown, George E. 
Collins, Mark J. Encarnacion, Jeremy R. Johnson        
Werner Krandick, Richard Liska, Scott McCallum,        
Nicolas Robidoux, and Stanly Steinberg                 
=======================================================
Enter an informal description  between '[' and ']':
[todai-2021-3]Enter a variable list:
(x)Enter the number of free variables:
1
Enter a prenex formula:
[
    8 x = (x + 1) (x^2 + 3) /\
    x /= 1
].

=======================================================

Before Normalization >
finish

An equivalent quantifier-free formula:

x + 3 = 0


=====================  The End  =======================

-----------------------------------------------------------------------------
0 Garbage collections, 0 Cells and 0 Arrays reclaimed, in 0 milliseconds.
491841 Cells in AVAIL, 500000 Cells in SPACE.

System time: 9 milliseconds.
System time after the initialization: 5 milliseconds.
-----------------------------------------------------------------------------