!let brac2  =!instexstatic $$$$ \left\{\matrix{\mathstrut\cr\mathstrut\cr}\right. $$$$
!let brac3  =!instexstatic $$$$ \left\{\matrix{\mathstrut\cr\mathstrut\cr\mathstrut\cr}\right. $$$$
!let brac4  =!instexstatic $$$$ \left\{\matrix{\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr}\right. $$$$
!let brac5  =!instexstatic $$$$ \left\{\matrix{\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr}\right. $$$$
!let brac6  =!instexstatic $$$$ \left\{\matrix{\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr}\right. $$$$
!let brac7  =!instexstatic $$$$ \left\{\matrix{\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr}\right. $$$$
!let brac8  =!instexstatic $$$$ \left\{\matrix{\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr}\right. $$$$
!let brac9  =!instexstatic $$$$ \left\{\matrix{\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr}\right. $$$$
!let brac10 =!instexstatic $$$$ \left\{\matrix{\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr\mathstrut\cr}\right. $$$$
