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2* sin(pi/3) *sin (pi/3) +cos (pi/3) *cos (pi/3) /4* tg (pi/4) +sin (pi/6) +cos (pi/3 )
2* sin(pi/3) *sin (pi/3) +cos (pi/3) *cos (pi/3) /4* tg (pi/4) +sin (pi/6) +cos (pi/3 )
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