(p-5)(p+5) (m-3n)(3n+m) (7x-2)(2+7x) (2m+n)(2m-n) (4+ y²) (p² - 4) 2 (x² - 2)(x²+2) (a²+1)(1-a²) (2x² +3y)(3y-2x²) 10a – 0,2x3)(0,2x3+10a) - (5x3-0,4y²)(0,4y²+5x³)

1. (p-5)(p+5) = p² - 5² = p² - 25

2. (m-3n)(3n+m) = (m-3n)(m+3n) = m² - (3n)² = m² - 9n²

3. (7x-2)(2+7x) = (7x-2)(7x+2) = (7x)² - 2² = 49x² - 4 = 49x² - 4

4. (2m+n)(2m-n) = (2m)² - n² = 4m² - n² = 4m² - n²

5. (4+y²)(y²-4) = (y²+4)(y²-4) = (y²)² - 4² = y⁴ - 16 = y⁴ - 16

6. (x²-2)(x²+2) = (x²)² - 2² = x⁴ - 4 = x⁴ - 4

7. (a²+1)(1-a²) = (1+a²)(1-a²) = 1² - (a²)² = 1 - a⁴ = 1 - a⁴

8. (2x²+3y)(3y-2x²) = (3y+2x²)(3y-2x²) = (3y)² - (2x²)² = 9y² - 4x⁴ = 9y² - 4x⁴

9. (10a - 0,2x³)(0,2x³ + 10a) = (10a - 0,2x³)(10a + 0,2x³) = (10a)² - (0,2x³)² = 100a² - 0,04x⁶ = 100a² - 0,04x⁶

10. (5x³ - 0,4y²)(0,4y² + 5x³) = (5x³ - 0,4y²)(5x³ + 0,4y²) = (5x³)² - (0,4y²)² = 25x⁶ - 0,16y⁴ = 25x⁶ - 0,16y⁴

Ответ: Выше приведены результаты упрощения выражений.