exam Maths Puzzle Numerical Ability

Hi, I need help in simplifying the following:

1. 3(x + 5) + 11

2. 8(x + 4) - (x - 5)

3. 28((1/4)z + (1/7))

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exam Other Question

I am using the Distributive property here, and i have to simplify each expression. This problem has me stumped.

3(e-4f-ef)

Suggestions? Thank you. how do you solve 32x+1 + 3 2x-1= 8x4x^2-1?