p1. Find all real numbers $x$ that satisfy the inequality $$\frac{x^2-3}{x^2-1}+ \frac{x^2 + 5}{x^2 + 3} \ge \frac{x^2-5}{x^2-3}+\frac{x^2 + 3}{x^2 + 1}$$


p2. It is known that $m$ is a four-digit natural number with the same units and thousands digits. If $m$ is a square of an integer, find all possible numbers $m$.


p3. In the following figure, $\vartriangle ABP$ is an isosceles triangle, with $AB = BP$ and point $C$ on $BP$. Calculate the volume of the object obtained by rotating $ \vartriangle ABC$ around the line $AP$
[img]https://cdn.artofproblemsolving.com/attachments/c/a/65157e2d49d0d4f0f087f3732c75d96a49036d.png[/img]


p4. A class farewell event is attended by $10$ male students and $ 12$ female students. Homeroom teacher from the class provides six prizes to randomly selected students. Gifts that provided are one school bag, two novels, and three calculators. If the total students The number of male students who received prizes was equal to the total number of female students who received prizes. How many possible arrangements are there of the student who gets the prize?


p5. It is known that $S =\{1945, 1946, 1947, ..., 2016, 2017\}$. If $A = \{a, b, c, d, e\}$ a subset of $S$ where $a + b + c + d + e$ is divisible by $5$, find the number of possible $A$'s.
1. We start by defining the set \( S = \{1945, 1946, 1947, \ldots, 2016, 2017\} \). This set contains all integers from 1945 to 2017 inclusive.
2. We need to find the number of subsets \( A = \{a, b, c, d, e\} \subseteq S \) such that the sum \( a + b + c + d + e \) is divisible by 5.
3. First, we determine the number of elements in \( S \). The number of elements is \( 2017 - 1945 + 1 = 73 \).
4. Next, we classify the elements of \( S \) based on their remainders when divided by 5. We define the following subsets:
   - \( S_1 \): Elements with remainder 1 when divided by 5.
   - \( S_2 \): Elements with remainder 2 when divided by 5.
   - \( S_3 \): Elements with remainder 3 when divided by 5.
   - \( S_4 \): Elements with remainder 4 when divided by 5.
   - \( S_5 \): Elements that are multiples of 5 (remainder 0).

5. We count the number of elements in each subset:
   - \( S_1 \): \( |S_1| = 15 \)
   - \( S_2 \): \( |S_2| = 15 \)
   - \( S_3 \): \( |S_3| = 14 \)
   - \( S_4 \): \( |S_4| = 14 \)
   - \( S_5 \): \( |S_5| = 15 \)

6. We now consider different cases for selecting 5 elements from these subsets such that their sum is divisible by 5.

### Case 1: One element from each subset \( S_1, S_2, S_3, S_4, S_5 \)
- The number of such subsets \( A \) is:
  \[
  \binom{15}{1} \cdot \binom{15}{1} \cdot \binom{14}{1} \cdot \binom{14}{1} \cdot \binom{15}{1} = 15 \cdot 15 \cdot 14 \cdot 14 \cdot 15 = 661,500
  \]

### Case 2: Two elements from \( S_1 \), two elements from \( S_4 \), and one element from \( S_5 \)
- The number of such subsets \( A \) is:
  \[
  \binom{15}{2} \cdot \binom{14}{2} \cdot \binom{15}{1} = \frac{15 \cdot 14}{2} \cdot \frac{14 \cdot 13}{2} \cdot 15 = 105 \cdot 91 \cdot 15 = 143,325
  \]

### Case 3: Two elements from \( S_2 \), two elements from \( S_3 \), and one element from \( S_5 \)
- The number of such subsets \( A \) is:
  \[
  \binom{15}{2} \cdot \binom{14}{2} \cdot \binom{15}{1} = 143,325
  \]

### Case 4: All five elements from one of the subsets \( S_1, S_2, S_3, S_4, S_5 \)
- The number of such subsets \( A \) is:
  \[
  \binom{15}{5} + \binom{15}{5} + \binom{14}{5} + \binom{14}{5} + \binom{15}{5}
  \]
  Calculating each term:
  \[
  \binom{15}{5} = \frac{15 \cdot 14 \cdot 13 \cdot 12 \cdot 11}{5 \cdot 4 \cdot 3 \cdot 2 \cdot 1} = 3003
  \]
  \[
  \binom{14}{5} = \frac{14 \cdot 13 \cdot 12 \cdot 11 \cdot 10}{5 \cdot 4 \cdot 3 \cdot 2 \cdot 1} = 2002
  \]
  Summing these:
  \[
  2 \cdot 3003 + 2 \cdot 2002 + 3003 = 6006 + 4004 + 3003 = 13,013
  \]

7. Summing all the cases, we get the total number of possible subsets \( A \):
  \[
  661,500 + 143,325 \times 2 + 13,013 = 661,500 + 286,650 + 13,013 = 961,163
  \]

The final answer is \(\boxed{961,163}\)