Here, you put four open square brackets:
(elseif:$answer1 is (either: $ans1, $ans2, $ans3, $ans4, $ans5, $ans6))
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But it looks like you only need one open bracket. Try this:
(elseif:$answer1 is (either: $ans1, $ans2, $ans3, $ans4, $ans5, $ans6))
[[[Next|next 1.2]]]