Expression 7: "f" left parenthesis, "x" , right parenthesis equals Start sum from "n" equals 1 to 4, end sum, "k" Subscript, "i" , Baseline left bracket, "n" , right bracket "x" Superscript, left parenthesis, 4 minus "n" , right parenthesis , Baselinefx=4∑n=1kinx4−n
7
`f'=${s_1}` "S" Subscript, 1 , Baseline equals left parenthesis, "P" Subscript, 1 , Baseline . "x" plus 1 , "P" Subscript, 1 , Baseline . "y" plus "s" Subscript, 1 , Baseline , right parenthesisS1=P1.x+1,P1.y+s1
Label:
equals=
left parenthesis, negative 1 , 2 , right parenthesis−1,2
8
Expression 9: "p" Subscript, "o" "l" "y" , Baseline left parenthesis, "u" , "s" , right parenthesis equals polygon left parenthesis, "u" , left parenthesis, "s" . "x" , "u" . "y" , right parenthesis , "s" , right parenthesispolyu,s=polygonu,s.x,u.y,s