Evaluate Cos31 cos38 -sin59 sin52
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COS31 COS38-SIN59 SIN52
COS(90-59) COS(90-52)-SIN59 SIN52
SIN59 SIN52-SIN59 SIN52
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COS(90-59) COS(90-52)-SIN59 SIN52
SIN59 SIN52-SIN59 SIN52
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