that lot simplifies to 4=8x
i think that was your question
got some variables in an example that are being combined, as follows:
2x * x^2 + 4 - x^2 * 2x = 8x
does this really equal 8x?
(2x*x^2) + 4 -(x^2*2x)
both left and right cancel out leaving the 4 no?
i'm sure i'm missing something simple.