Is the square equation still true when both sides of the equation are equal?

Is the square equation still true when both sides of the equation are equal?

If it is true, the square is equal to multiplying itself by itself. It is equal to itself, and it will be equal after multiplying itself

Find the rules: the first line 1, the second line 2 3 4, the third line 5 6 7 8 9, the fourth line 10 11 12 13 15 16
Line 5 17 18 19 20 21 22 24 25
Line 6 26 27 28 29 30 31 32 33 34 35 36
1. Use the algebraic expression containing n to express that the first number of the nth row is, and the last number is, how many numbers does the nth row have?
2. The sum s of the numbers in the nth row is represented by an algebraic expression containing n

The first number in the nth row is (n-1) ^ 2 + 1, the last number is n ^ 2, and the nth row has 2N-1
2. The sum s of the numbers in the nth row is represented by an algebraic expression containing n
S=1/2 *(2n-1)( (n-1)^2+1+n^2)
=(2n-1)(2n^2-2n+2)/2
=(2n-1)(n^2-n+1)

The thirteen integers 1,2,3,4,5,6,7,8,9,10,11,12,13 are divided into two groups, so that the sum of all numbers in a group is greater than 10
There are several

11,10;3~12,11;13~4,12~3.
3 kinds