Question

Rezolvati ex. {21+20[19+18x(17-8x2)+16x(15x14-200)-11]}-3x(21-17)

Answer 1

{21+20[19+18x(17-8x2)+16x(15x14-200)-11]}-3x(21-17)=
={21+20x[19+18x(17-16)+16x(210-200)-11]}-3x4=
=[21+20x(19+18x1+16x10-11)]-12=
=[21+20x(19+18+160-11)]-12=
=[21+20x(197-11)]-12=
=(21+20x186)-12=
=(21+3720)-12=
=3741-12=
=3729