277+5x{28:7+5x[30+9x(200:5-84:4)]}

Răspuns :

277+5×{4+5×[30+9×(40-21)]}
277+5×{4+5×[30+9×19]}
277+5×{4+5×[30+171]}
277+5×{4+5×201}
277+5×{4+1005}
277+5×1009=277+5045=5322
.....................:-):-):-):-)
Vezi imaginea MULTUMESC453