Are these correct?

1. Multiply:

(10z+5)(z^{2 }- 2z+10)

10z2. Divide:^{3}- 15z^{2}+ 90z + 50

16r^{3}- 12r^{2}+ 60r + 16

------------------------

8r+2

2(r3. Divide Synthetically:^{2 }- r +4)

(2m^{3}+ 5m^{2}+ 6m -4) / (m +1)

2m4. Subtract 13r^{2}+ 3m + 3 R= -7/m+1

^{2 }- 9r + 3 from 7r^{2}- 4r - 8

-6r^{2}+ 13r +5

5. Divide:

18r^{3 }- 9r^{2}+34r +45

--------------------

6r + 5

3r^{2}- 4r + 9

6. Factor:

uv^{2}- 4 - v^{2}+ 4

(u+1)(v7. Factor:^{2}+ 4)

x^{2}(y-7)^{2}+ 5x(y-7)^{2}+4(y-7)^{2 }

(y-7)8.Factor:^{2}(x+4)(x-1)

x^{3 }+ 125

(x+5)(x9. Factor:^{2}-5x+25)

16a^{4 }- 1

(4a10. If g(t) = 2t^{2}+1)(4a^{2}- 1)

^{2}+11t-10, find t such that g(t) = 11

g(t) = 353

11. Evaluate:

4x^{2}y^{2}+2x^{2}y - 3xy^{2}- 3xy + 6 when x= -2 and y = 2

-212. If P(y) = 1/2y -1 then find y such that P(y)= -5

P(y) = - 13/2

And I need help setting up this problem:

Solve this equation:

n^{3}+80n=18n^{2}

Would you set it up as n^{3}+80n+18n^{2}= 0 ?

I'm not sure what my steps need to be to set it up to try and solve it.

Thank you for any help!