Expression 11: "f" left parenthesis, "x" , "y" , right parenthesis equals left parenthesis, join left parenthesis, sin left parenthesis, "a" , right parenthesis sin "b" , .9 plus "z" cos left parenthesis, left bracket, "a" , "a" , "b" , "b" , right bracket plus StartFraction, "z" Over 4 , EndFraction , right parenthesis sin left parenthesis, left bracket, "b" , "b" , "a" , "a" , right bracket , right parenthesis , right parenthesis .minwith "a" equals "x" plus StartFraction, sin StartNestedFraction, "y" NestedOver 2 , EndNestedFraction Over 6 , EndFraction , "b" equals "y" minus StartFraction, sin StartNestedFraction, "x" NestedOver 2 , EndNestedFraction Over 6 , EndFraction , "z" equals left bracket, 1 , negative 1 , negative 1 , 1 , right bracket , right parenthesisfx,y=joinsinasinb,.9+zcosa,a,b,b+z4sinb,b,a,a.minwitha=x+siny26,b=y−sinx26,z=1,−1,−1,1
