a) (4+ 27) - 1la 10=
31-1=30
b)(10³-125*2³): 123la 123
(1000-1000): 123la 123
0: 213 la 123=0
c)[(10³:5²:8+3²*5²):3la 0]-2²la 0=
[(1000:25:8+9*25):0]-4 la 0
[(40:8+225):0]-0
[(5+225):0]-0
(230:0)-0=0
d){[(12²+5²):13]²-2 la 7-2 la 0}:2³
{[(144+25):13]²-128-0}:8
[(169:13)²-128]:8
(13²-128):8
(169-128):8
41:8=5,125
