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-1/2*1.20*10^2x^2+0.2*9.81*2cos(53.1 degrees)(-x-4)+9.81*2sin(53.1 degrees)(x+4) = 0
-1/2*1.20*10^2x^2+0.2*9.81*2cos(53.1 degrees)(-x-4)+9.81*2sin(53.1 degrees)(x+4) = 0
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