a) (-4,3)+\(\left[\left(-7,5\right)+4,3\right]\)
=\(\left(-4,3\right)+4,3+\left(-7,5\right)\)
=-7,5
b)\(45,3+\left[-7,3+\left(-22\right)\right]\)
=\(45,3-7,3+\left(-22\right)\)
=38-22
=16
c)\(\left[\left(-11,7\right)+5,5\right]+\left[11,7+\left(-2,5\right)\right]\)
=\(\left[\left(-11,7\right)+11,7\right]+5,5-2,5\)
=\(3\)