Wow, soulja needs a lot o' helpin'

1) the first is not anything to worry about, just replace a and b with the numbers and work it out using your calculator, that is:

what is: [(-1)^3 - 3]/[-1 + 3]

2) a fraction is undefined when the denominator is zero, so the function is undefined for x + 2 = 0

3) there is a single term in the bottom, just divide it into each

(8x - 8)/4 = (8/4)x - (8/4)

or if you want to be elegant, factor a 4 out the top:

(8x - 8)/4 = 4(2x - 2)/4

now the answer is blatantly staring you in the face

4) factorize the top, something should cancel

when you get those tell me, and if i'm still online i'll help you with the rest