Complex Arithmetic/Examples/(2i-1)^2 (4(1-i)^-1 + (2-i) (1+i)^1)

Example of Complex Arithmetic

 * $\paren {2 i - 1}^2 \paren {\dfrac 4 {1 - i} + \dfrac {2 - i} {1 + i} } = -\dfrac {11} 2 - \dfrac {23} 2 i$