Addition
2+2
4
20+30
50
2x1
2
3x3
9
50x9
450
90+90
180
120+240
603
2x2
4
9x9
81
10x60
600
90+45
135
50+40
90
2x3
6
81x81
6561
10x70
700
20+20
40
70+120
190
2x4
8
7x37
259
11x234
2574
50+70
120
57+72
129
2x5
10
78x23
1794
182x345
62790