documentclass{article}
usepackage{amsmath, mathtools, amssymb}
usepackage{fouriernc, fourier}
usepackage{esvect}
begin{document}
[left{begin{array}{l}
left[begin{array}{l}
vv{BM}uparrowuparrow vv{BC}\
vv{BM}uparrowdownarrow vv{BC}
end{array}
right.
\
left[begin{array}{l}
vv{B'M'}uparrowuparrow vv{B'C'}\
vv{B'M'}uparrowdownarrow vv{B'C'}
end{array}
right.
end{array}
right.
]
[left[begin{array}{l}
left{begin{array}{l}
Ain Delta\
Bnot in Delta
end{array}
right.
\
left{begin{array}{l}
Anot in Delta\
B in Delta.
end{array}
right.
end{array}
right.]
end{document}