運算式 2: sine left parenthesis, "x" , right parenthesis signum left parenthesis, cos left parenthesis, "x" , right parenthesis , right parenthesis plus left parenthesis, Start sum from "n" equals 1 to "N" , end sum, left parenthesis, 2 "H" left parenthesis, StartFraction, pi Over 2 , EndFraction minus "n" pi , "x" , right parenthesis minus 2 , right parenthesis , right parenthesis plus left parenthesis, Start sum from "n" equals 0 to "N" minus 1, end sum, 2 "H" left parenthesis, StartFraction, pi Over 2 , EndFraction plus "n" pi , "x" , right parenthesis , right parenthesissinxsigncosx+N∑n=12Hπ2−nπ,x−2+N−1∑n=02Hπ2+nπ,x
2
運算式 3: "N" equals 0N=0
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5050
3
運算式 4: StartFraction, 2 "x" Over pi , EndFraction2xπ
