final steps

2x2.txt

+1 1
+5+ 2,3,4
\ No newline at end of file

3x3.txt

+6x 1,4
+6+ 2,3,6
+3x 5,7,8
+2 9
\ No newline at end of file

4x4.txt

+10+ 1,2,5
+4+ 3,7
+2÷ 4,8
+24x 6,10,11
+3x 9,13,14
+24x 12,15,16
\ No newline at end of file

4x4_divdiff.txt

+2 1
+72x 2,5,6,7
+2- 3,4,8
+2÷ 9,13,14
+3x 10,11
+24x 12,15,16
\ No newline at end of file

5x5.txt

+9+ 1,6
+1- 2,7
+2- 3,4
+7+ 5,9,10,15
+4 8
+12x 11,16,17
+7+ 12,13
+9+ 14,18,19
+100x 20,24,25
+6+ 21,22,23
\ No newline at end of file

6x6.txt

+48x 1,7,8,13
+11+ 2,3
+1- 4,5
+18x 6,12
+72x 9,15,16,21
+60x 10,11,17
+6x 14,20
+11+ 18,23,24
+7+ 19,25
+8x 22,27,28
+3 26
+13+ 29,34,35
+2÷ 30,36
+3 31
+9+ 32,33
\ No newline at end of file

7x7.txt

+6x 1,2
+112x 3,9,10
+7 4
+18x 5,6,13
+13+ 7,14,21
+1- 8,15
+8+ 11,12
+18+ 16,22,23
+6+ 17,18,25
+3- 19,20
+20+ 24,30,31,32,38
+10+ 26,33,40
+4 27
+14+ 28,34,35
+10+ 29,36,37
+24x 39,45,46
+14+ 41,47,48
+12x 42,49
+7+ 43,44
\ No newline at end of file

8x8.txt

+8 1
+14x 2,10,11
+12x 3,4
+19+ 5,6,7,14
+2 8
+210x 9,17,18,25
+12x 12,19,20
+4 13
+480x 15,22,23,31
+192x 16,24,32
+432x 21,28,29,30,37
+12+ 26,27
+17+ 33,34,41
+70x 35,36,44
+8x 38,46
+10+ 39,40,48
+19+ 42,49,50,51
+8 43
+23+ 45,52,53,54
+2÷ 47,55
+35x 56,64
+3- 57,58
+14+ 59,60
+30x 61,62,63