Can i get some help please

1. Add the polynomials and simplify. (9m4 + 8m3 - 7m) + (7m4 + 9m2 + 5m)

2.Q varies inversely as the square of p, and Q = 36 when p = 7. Find Q when p = 6.

3. Find the product of (x - 2y)2

4.The square of a number is equal to 6 more than the number. Find all such numbers.

5. Subtract.5/4t - t+4/10t square