LIB "tst.lib"; tst_init(); LIB "ncfactor.lib"; ring R = 0,(n,s),dp; def r = nc_algebra(1,s); setring(r); poly h = n*(n+1)*s^2-2*n*(n+100)*s+(n+99)*(n+100); facFirstShift(h); tst_status(); tst_status(1); $