Multiply. Simplify your answer.
1. n + 3/n- 5 x (n^2 - 5n)
A: n^2 + 3n
2. 6xy^2/2x^2y^6 x 6x^4y^4/9x^3
A: 2
3. 3h^3 - 6h/10g^2 x 4g/g^2 - 2g
A: ?
4. m^2 + m - 2/m^2 - 2m - 8 x m^2 -8 + 16/3m -3
A: m-4/3
Man, you gotta start using parentheses. Can't you see how hard it is to separate the terms and factors?
#1 and #2 are ok
#3
3h(h^2-2)/10g^2 * 4g/g(g-2)
I suspect a couple of typos, so I will say it's
(3g^2-6g)/10g^2 * 4g/(g^2-2g)
3g(g-2)/10g^2 * 4g/g(g-2)
3(g-2)/10g * 4/(g-2)
6/5g
#4 I suspect a typo, but I'm reading it as
(m+2)(m-1)/(m-4)(m+2) * (m-4)(m-4)/3m
(m-1)/(m-4) * (m-4)(m-4)/3m
(m-1)(m-4)/3m
(m^2-5m+4)/3m
If that's not the right interpretation, just make your changes and continue on as I did, watching for common factors which cancel out.