1. If x=2π => (∂/∂x)[sin(2x-π/2)+6]=(∂/∂*2π)[sin(4π-π/2)+6]=(∂/∂*2π)[sin(7π/2)+6]=(∂/∂*2π)(-1+6)=∂/∂*2π*5=5∂/∂*2π And I have no idea how to get the partial derivate out since I haven’t been to my college classes :(

  2. You, it’s actually a really crappy captcha, because the answer will always be some small number, often an integer. So a really insistent bot who tries random small numbers should get past in a couple of tries.

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