-x2 = x - 6
x2 + x - 6 = 0
(x - 2)(x + 3) = 0
x ∈ {-3, 2}
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Guessing they are powers and no operational symbol is between the two (ie a multiplication is assumed), then: x6 x2 = x6 + 2 = x8 Otherwise, re-ask with words for missing symbols, eg "what is x to the power 6 plus x to the power 2 simplified"
f(x) = x6 - 3x g(x) = x2 - 4 f(g(x)) = f(x2 - 4) = (x2 - 4)6 - 3(x2 - 4) = (x2 - 4)6 - 3x2 - 12 = (x12 - 24x10 + 240x8 - 1280x6 + 3840x4 - 6144x2 + 4096) - 3x2 - 12 = x12 - 24x10 + 240x8 - 1280x6 + 3840x4 - 6147x2 + 4084
x1:y1 = x2:y2 4:-2 = x2:5 x2 = (4*5)/-2 x2 = -10
x2 23x equals 0
if c = x2 then cx2 = x4