$a)\left[\left(192:8\right):4\right]:2=\left[\left(160:8+32:8\right):4\right]:2=\left[\left(20+4\right):4\right]:2=\left[24:4\right]:2=12:2=6$

$b)192:\left[\left(8:4\right):2\right]=192:\left[2:2\right]=192:1=192$ $b)192:\left[\left(8:4\right):2\right]=192:\left[2:2\right]=192:1=192$

$c)192:\left[8:\left(4:2\right)\right]=192:\left[8:2\right]=192:4=160:4+32:4=40+8=48$

$d)\left(192:8\right):\left(4:2\right)=24:2=12$

$e)\left(96:2\right)\cdot \left(3\cdot 4\right)=48\cdot 12=\left(50-2\right)\cdot 12=50\cdot 12-2\cdot 12=600-24=576$

$f)\left[96:\left(2\cdot 3\right)\right]\cdot 4=\left[96:6\right]\cdot 4=16\cdot 4=10\cdot 4+6\cdot 4=40+24=64$