Expression 3: StartFraction, sin left parenthesis, max left parenthesis, max left parenthesis, "x" , "a" , right parenthesis , max left parenthesis, 180 minus "x" minus "a" , 90 , right parenthesis , right parenthesis , right parenthesis Over 4 sin left parenthesis, StartNestedFraction, "x" NestedOver 2 , EndNestedFraction , right parenthesis sin left parenthesis, StartNestedFraction, "a" NestedOver 2 , EndNestedFraction , right parenthesis sin left parenthesis, StartNestedFraction, 180 minus "x" minus "a" NestedOver 2 , EndNestedFraction , right parenthesis , EndFractionsinmaxmaxx,a,max180−x−a,904sinx2sina2sin180−x−a2