Expression 4: polygon left parenthesis, left parenthesis, 0 , 0 , right parenthesis , left parenthesis, cos left parenthesis, "a" , right parenthesis cos left parenthesis, "b" , right parenthesis , sin left parenthesis, "a" , right parenthesis cos left parenthesis, "b" , right parenthesis , right parenthesis , left parenthesis, cos left parenthesis, "a" , right parenthesis cos left parenthesis, "b" , right parenthesis , 0 , right parenthesis , right parenthesispolygon0,0,cosacosb,sinacosb,cosacosb,0
4
Expression 5: polygon left parenthesis, left parenthesis, 0 , sin left parenthesis, "a" plus "b" , right parenthesis , right parenthesis , left parenthesis, cos left parenthesis, "a" plus "b" , right parenthesis , sin left parenthesis, "a" plus "b" , right parenthesis , right parenthesis , right parenthesispolygon0,sina+b,cosa+b,sina+b
5
Expression 6: polygon left parenthesis, left parenthesis, cos left parenthesis, "a" plus "b" , right parenthesis , 0 , right parenthesis , left parenthesis, cos left parenthesis, "a" plus "b" , right parenthesis , sin left parenthesis, "a" plus "b" , right parenthesis , right parenthesis , right parenthesispolygoncosa+b,0,cosa+b,sina+b
6
Expression 7: polygon left parenthesis, left parenthesis, 0 , sin left parenthesis, "a" , right parenthesis cos left parenthesis, "b" , right parenthesis , right parenthesis , left parenthesis, cos left parenthesis, "a" , right parenthesis cos left parenthesis, "b" , right parenthesis , sin left parenthesis, "a" , right parenthesis cos left parenthesis, "b" , right parenthesis , right parenthesis , right parenthesispolygon0,sinacosb,cosacosb,sinacosb