separazione matrice lunga

Salve,

ho una matrice molto lunga, qual è il modo migliore per separarla in più parti?

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\[A = \begin{bsmallmatrix}
0 &0 &0 &0 &0 &1 &0 &0 &0 &0 &0 &0 &0 \\
0 &0 &0 &0 &0 &0 &1 &0 &0 &0 &0 &0 &0 \\
0 &0 &0 &0 &0 &0 &0 &0 &0 &0.004031 &0.004031 &0 &0 \\
-26.67 &0.006109X_f + 2.345e-5X_r – 1.872 &-1\dot{\psi} &0 &- 0.01087\dot{\theta}_f – 0.02006\dot{\theta}_r – 1\dot{x}_1 &0.005555\dot{\theta}_r – 0.001795\dot{\theta}_f &- 0.0105\dot{\theta}_f – 0.05924 &0.005555\dot{\phi} – 0.02006\dot{\psi} &-0.0105\dot{\delta} – 0.001795\dot{\phi} – 0.01087\dot{\psi} &2.345e-5\delta &0.006109\delta &0.0185 &0.01001 \\
-0.2868 &- 0.007088X_f – 0.0001486X_r – 2.553 &6.499e-16\dot{\psi} &0 &0.004747\dot{\theta}_r – 0.01483\dot{\theta}_f + 6.499e-16\dot{x}_1 &0.01668\dot{\theta}_f – 0.02744\dot{\theta}_r &0.3754 – 0.005632\dot{\theta}_f &0.004747\dot{\psi} – 0.02744\dot{\phi} &0.01668\dot{\phi} – 0.005632\dot{\delta} – 0.01483\dot{\psi} &-0.0001486\delta &-0.007088\delta &-0.01782 &0.02553 \\
&43.38 &2.942 – 4.417e-5X_r – 0.01023X_f &-2.35e-15\dot{\psi} &0 &0.01708\dot{\theta}_f + 0.03283\dot{\theta}_r – 2.35e-15\dot{x}_1 &0.007292\dot{\theta}_f – 0.004747\dot{\theta}_r &0.01853\dot{\theta}_f + 0.1116 &0.03283\dot{\psi} – 0.004747\dot{\phi} &0.01853\dot{\delta} + 0.007292\dot{\phi} + 0.01708\dot{\psi} &-4.417e-5\delta &-0.01023\delta &-0.02126 &-0.01296 \\
261.0 &0.2482X_f + 0.006179X_r + 127.4 &5.95e-17\dot{\psi} &0 &0.7397\dot{\theta}_f – 0.0173\dot{\theta}_r + 5.95e-17\dot{x}_1 &0.05818\dot{\theta}_r – 1.434\dot{\theta}_f &0.007533\dot{\theta}_f – 15.61 &0.05818\dot{\phi} – 0.0173\dot{\psi} &0.007533\dot{\delta} – 1.434\dot{\phi} + 0.7397\dot{\psi} &0.006179\delta &0.2482\delta &0.0353 &-0.3097 \\
0 &0 &0 &0 &0 &0 &0 &0 &0 &-0.2901 &0 &0 &0 \\
0 &0 &0 &0 &0 &0 &0 &0 &0 &0 &-0.4242 &0 &0 \\
0 &0 &49211.0 – 4.101X_r &0 &0 &0 &0 &15000 &0 &-4.101\dot{x}_1 &0 &0 &0 \\
0 &0 &50000 – 4.167X_f &0 &0 &0 &0 &0 &15244 &0 &-4.167\dot{x}_1 &0 &0 \\
5441\dot{x}_1 &0 &5441\phi – 4.101Y_r &-64933 &31155 &0 &0 &0 &0 &0 &0 &-4.101\dot{x}_1 &0 \\
3911\dot{x}_1 &43266\dot{x}_1 &43266\delta – 4.167Y_f + 3911\phi &-46566 &-43522 &0 &5393 &0 &0 &0 &0 &0 &-4.167\dot{x}_1
\end{bsmallmatrix}\]
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Riccardo