I Need Algebra Help please?

1.8a^15
2.81xy^12
3.25a^6b^8
4.-mn^24
5.-200x2y^3xy^6

1)
(2a^5)^3
= (2^3)[a^(5 * 3)]
= 8a^15

2)
(-3xy^3)^4
= (-3)^4(x^4)[y^(3 * 4)]
= 81x^4y^12

3)
(5a^3b^4)^2
= (5^2)[a^(3 * 2)][b^(4 * 2)]
= 25a^6b^8

4)
(-mn^8)^3
= (-m)^3[n^(8 * 3)]
= -m^3n^24

5)
(-2x^2y)^3 * (5xy^3)^2
= (-2)^3[x^(2 * 3)]y^3 * (5^2)(x^2)[y^(3 * 2)]
= -8x^6y^3 * 25x^2y^6
= (-8 * 25)[x^(6 + 2)][y^(3 + 6)]
= -200x^8y^9

Assuming the numbers after the brackets are exponents:

1. 8a^15
2. 81x^4y^12
3. 25a^6b^8
4. -m^3n^24
5. -200x^8y^9

Assuming the numbers after the brackets are not exponents, but the ones that follow the letters are:

1. 6a^5
2. -12xy^3
3. 10a^3b^4
4. -3mn^8
5. -60x^3y^6

I'm assuming the first ones are the answers according to the textbook, so just work on your formatting on the comp so it's easier for us to help you out. :)