Expression 2: mod left parenthesis, "x" , 1 , right parenthesismodx,1
2
Expression 3: 1 half plus StartFraction, 1 Over pi , EndFraction arc tangent left parenthesis, tan left parenthesis, pi left parenthesis, "x" minus 1 half , right parenthesis , right parenthesis , right parenthesis12+1πarctantanπx−12