How do you do this ?

One integer is 5 more than another. their product is 104. find the integers

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Write a description of each inequality. 1. -5a + 3 > 1 2. 27 - 2b < -6 (this < has a _ under it) 3. 1/2 (c + 1) > 5 (this > has a _ under it)