My guess for last night was74.56∞∑n=0 sin(−0.5·n)n=−98.50...

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    My guess for last night was

    74.56

    n=0 
    sin(−0.5·n)

    n
    =−98.50


    Tonight?

    172.10 e
    1

    −1 
    x2

     

    1−x2
     
    dx
 
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