Expression 12: "A" Subscript, 1 , Baseline minus left parenthesis, "B" Subscript, 2 , Baseline minus "A" Subscript, 2 , Baseline , right parenthesisA1−B2−A2
equals=
negative 4−4
12
Expression 13: "A" Subscript, 2 , Baseline plus left parenthesis, "B" Subscript, 1 , Baseline minus "A" Subscript, 1 , Baseline , right parenthesisA2+B1−A1
equals=
negative 2−2
13
Expression 14: "D" Subscript, 1 , Baseline equals "A" Subscript, 1 , Baseline minus "B" Subscript, 2 , BaselineD1=A1−B2
equals=
negative 4−4
14
Expression 15: "D" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline plus "B" Subscript, 1 , BaselineD2=A2+B1