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It looks like you've uploaded a math assignment titled "Trabajo de intensificación de contenidos en proceso de aprendizaje" with two parts. Let’s go over the key elements:

### **Primera Parte**:
1. **Escribir el intervalo correspondiente**:
   - a) \( A = \{ x \in \mathbb{R} : -8 \leq x \leq 3 \} \)
   - b) \( B = \{ x \in \mathbb{R} : -1 \leq x \leq x \} \)
   - Two other sub-problems to solve or represent intervals.

2. **Resolver**:
   - Two algebraic problems, one involving square roots and operations.

3. **Representar \( \sqrt{12} \)**:
   - You are asked to plot \( \sqrt{12} \) on a number line.

4. **Resolver más expresiones**:
   - Simplify roots like \( \sqrt{135} - \sqrt{40} + \sqrt{625} \) and others.

5. **Hallar el valor de \( x \) en sucesiones**:
   - Involves solving arithmetic or geometric sequences with given terms.

### **Segunda Parte**:
1. **Resolver las operaciones**:
   - Simplify expressions like \( (3x - 5)^2 - (2x - 3)(3x - 7) \).

2. **Hallar cociente y resto de divisiones**:
   - Polynomial division such as \( (x^5 - 20x + 3x + 11x^2) \div (x + 3) \).

3. **Resolver más operaciones**:
   - Further simplification of polynomial expressions.

Would you like to focus on solving a specific problem from the assignment? Let me know which one, and I can walk you through the steps.

Trabajo de intensificación de contenidos en proceso de aprendizaje (Mathematical exercises including intervals, algebraic expressions, sequences, and polynomials)

Solve a variety of mathematical problems including intervals, algebraic expressions, sequences, and polynomial division. This assignment targets high school-level students, covering key algebraic concepts and sequence calculations. Learn how to simplify roots and handle complex expressions step-by-step.

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