A = (1 2 -3 5), B =(0 -6 1 4), C=(3 8 7 1), D=( -1 9 4 3). Найти F=D*(A - 5C)

[latex]F=D*(A-5C)\\ A = \left[\begin{array}{ccc}1&2\\-3&5\end{array}\right] \\ 5C = \left[\begin{array}{ccc}15&40\\35&5\end{array}\right] \\ D= \left[\begin{array}{ccc}-1&9\\4&3\end{array}\right] \\ \\ \\ F=\left[\begin{array}{ccc}-1&9\\4&3\end{array}\right] * \left[\begin{array}{ccc}15&40\\35&5\end{array}\right] = \left[\begin{array}{ccc}-19&-40\\41&52\end{array}\right] \\\\[/latex]