Expression 3: "a" equals 1 half floor ( "x" ) ceiling left parenthesis, sin left parenthesis, "x" pi , right parenthesis , right parenthesis positive "b"a=12floor(x)ceilsinxπ+b
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Expression 4: "b" equals StartFraction, floor ( "x" plus 1 ) Over 2 , EndFraction ceiling left parenthesis, sin left parenthesis, "x" pi minus pi , right parenthesis , right parenthesisb=floor(x+1)2ceilsinxπ−π