refactor: add more template

data/tetests/spsolve_test.txt

 a = sparse([0,0,0,1,2,2], [0,1,2,1,1,2], [1,1,2,3,3,sin(8-2)], 3, 3);
 a = sparse([0,0,0,1,2,2], [0,1,2,1,1,2], [1,1,2,3,3,sin(8-2)], 3, 3);
 b = [1,12,7];
 b = [1,12,7];
 r = sp_linsolve(a, b, [0,0,0]);
 r = sp_linsolve(a, b, [0,0,0]);
-return r;
+r2 = sp_linsolve(a, b);
\ No newline at end of file
+return r - r2;
\ No newline at end of file

data/tetests/spsolvex_test.txt

@@ -3,4 +3,5 @@ g2 = 1*3*x2 - 4*3;
 g3 = 1*3 * x2+sin(8-2)*x3 - 7;
 g3 = 1*3 * x2+sin(8-2)*x3 - 7;
 b = [0,0,0];
 b = [0,0,0];
 r = sp_linsolvex([g1,g2,g3], b, [0,0,0], [x1,x2,x3]);
 r = sp_linsolvex([g1,g2,g3], b, [0,0,0], [x1,x2,x3]);
-return r;
+r2 = sp_linsolvex([g1,g2,g3], [], [], [x1,x2,x3]);
\ No newline at end of file
+return r-r2;
\ No newline at end of file