2.(-t) x (-t^2)^6 x t = -t^ 14

3.(a-b)x {(b-a)^3}^5 = {-(b-a)} x(b-a)^ 15 = -(b-a)^ 16

4 don't understand the meaning of the question

5.x^5(x^4+ 1)

6.(x^3)x(y^2)x(-xy^3)^2 = x^3y^2x^2y^6 = x^5y^8

7.(-2a^4)^2+a^ 12 = 4a^8+a^ 12 =a^8(4+a^4)

8.( 1/7)^ 18 x(-7)^ 19 = 7^- 18 x(-7^ 18)=- 1/7

9.[(9m) 4 (n 2) 3]+[(-3m) 2 (n) 3] 2 Is this a question you didn't say? The process is as follows:

(9^4)(m^4)(n^6)+[9(m^2)(n^3)]^2 =(9^4)(m^4)(n^6)+(9^2)(m^4)(n^6)=(m^4)(n^6)x(9^2+9^4)

10.(3 a^2)^3( b^4)-3(ab^2)^2( a^4)= 9(a^6)(b^4)-3(a^2)(b^4)(a^4)= 6(a^6)(b^4)

1 1.(3x 10^4)3 = 3^3x 10^ 12 = 27x 10^ 12 = 2.7x 10^ 13

12.2^(x+3)。 3^(x+3)= 36^(x-2)(2^x)(2^3)(3^x)(3^3)=(36^x)/(36^2)(2^x))(3^x)(27。 8 .36^2)= 36^x 6^x =(27)(8)(36^2)x = 7