The document appears to be a triangular array showing increasing numbers. It starts with 1 in the top left corner and increases in a triangular pattern, with each subsequent row adding new numbers and increasing the existing numbers based on their position in the triangle. The highest number in the document is 70 in the center of the 9th row.

2. ● 1
● ● 3
● ● ● 6
● ● ● ● 10
● ● ● ● ● 15

14. 6-

51. 1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
1 6 15 20 15 6 1
1 7 21 35 35 21 7 1
1 8 28 56 70 56 28 8 1