Expression 43: "t" Subscript, 1 , Baseline equals StartFraction, negative "b" Subscript, 1 , Baseline "E" Subscript, 1 , Baseline plus "b" Subscript, 1 , Baseline "D" Subscript, 1 , Baseline minus "b" Subscript, 2 , Baseline "E" Subscript, 2 , Baseline plus "b" Subscript, 2 , Baseline "D" Subscript, 2 , Baseline Over negative "b" Subscript, 1 , Baseline "c" Subscript, 2 , Baseline plus "b" Subscript, 2 , Baseline "c" Subscript, 1 , Baseline , EndFractiont1=−b1E1+b1D1−b2E2+b2D2−b1c2+b2c1