Simplify [[1300,1400],[2000,1800],[1600,1200]]

$[\begin{array}{c} 1300 & 1400 \\ 2000 & 1800 \\ 1600 & 1200 \end{array}]$

Substitute in each matrix definition.

$[\begin{array}{c} 1300 & 1400 \\ 2000 & 1800 \\ 1600 & 1200 \end{array}]$