What is the law of fraction addition and subtraction? And the law of integer exponential power

[rule of fractional addition and subtraction]
1. Add and subtract the same denominator fraction, add and subtract the molecules, and the denominator remains unchanged
2. Addition and subtraction of fractions with different denominators, first general division, change into fractions with the same denominator, and then addition and subtraction

RELATED INFORMATIONS

1. First fraction addition and subtraction 1.(1/x＾3-1/x＾2)×x＾3/x-1 2.x/2-x-4-x＾2/x＾2-4x+4 3.x/x+1-x＾2+1/x＾2+x 4.2/a＾2-1+1/a+1
2. The basic problem of solving several formula deformations (fraction) We need 10 courses. We must be basic, In a hurry in a hurry in a hurry in a hurry in a hurry Junior high school has a "formula deformation" class, that is to give a formula, let you deformation
3. On the transformation of proper fraction into partial fraction sum Q (x) = (x-x1 (x-x2) -- (x-xn), then, r(x)/Q(x)=A1(x-x1)+A2/(x-x2)----+An/x-xn) Where, how to use the undetermined coefficient method to find AI (I = 1,2,3,4, --)
4. Fractional deformation 1、（1/3x+1/5y）/（2x-y） 2、（1/x）/（1/y） 3、（-a+b）/（a-b） 4、 x/y
5. Can you tell me about this fractional distortion X-Y (Y-X) squared ---- = --------- 5Y ( ) It's messy to write That is, X-Y of 5Y = what is the square of (Y-X)?
6. PEP fifth grade volume I mathematics 120 page 2
7. The average of five consecutive natural numbers is 17. After adding two adjacent even numbers, the average is 21. What are the two even numbers?
8. Compilation of key knowledge points in volume 4 and volume 5 Overall, it's better to be in order
9. There are chickens and rabbits in a farm. If the sum of the number of chickens and rabbits is 180 and the sum of the number of legs is 480, then chickens are better than rabbits
10. There are 600 pear and peach trees in the orchard, of which the number of peach trees is three times that of pear trees. How many pear trees are there?
11. The addition and subtraction of fractions (1) Given a + B = 3, ab = 1, then the value of a / B + B / A is () (2) If x
12. Add appropriate formula to keep the score unchanged A-B of a + B = A & # 178; - B & # 178; + a = a + 1 of C
13. =I want to solve some fraction problems in the second grade of junior high school ①(5mn²)^-3/（4m³n)^-2 ② (3 under 1-2 radical) ^ 0 - (2 ^ - 1) + | - 3| ③a^-2b²*(-2²b^-2)^-2/a^-4b²
14. Factorization of 2x ^ 2 + 2xy-y ^ 2
15. In the following five polynomials, which rational number range can be factorized? And write a Book factorization process (everyone hurry up! Thank you) (1)3m(m-n)+6n(n-m) (2)x(b+c-d)-y(d-b-c)-2c+2d-2b (3)2(x-2)^2+5x-17 (4)ab-a-b-a (5)x^3-3x^2+3x-1
16. [(power of x) + 5x + 2] * [(power of x) + 5x + 3] Factorization!
17. Junior high school mathematics problems about factorization (× 2) 1. Evaluation: 20063 (cubic) - 10063-10003-3000 × 2006 × 1006 2. Calculation: (7 quartic + 64) (15 quartic + 64) (23 quartic + 64) (31 quartic + 64) (39 quartic + 64) / (3 quartic + 64) (11 quartic + 64) (19 quartic + 64) (27 quartic + 64) (35 quartic + 64) The first question may not be clear. It should be 2006 m3 - 1006 m3 - 1000 m3 - 3000 × 2006 × 1006 M3
18. The square of 4x - 2x + 6xy-3y The square of X - 8x + 9
19. Proof: when n is a positive integer, the square difference of two consecutive odd numbers must be a multiple of 8
20. 1.（3x-y)^2-3x+y 2.(2a+s)^2-6(2a+s)+9 3.4(x-y)^2+4(x-y)+1 4.(4x^2+1)^2-16x^2 5.(x-y)^3+2×(y-x)^2 6.4(3a+2x)^2-9(a-x)^2 7.y-x+3(x-y)^2