Question

{10+2×[10+2×(150-45×3)]}×5-23      ;

Answer 1

{10+2*[10+2*(150-45*3)]}*5-23=
{10+2*[10+2*(150-135)]}*5-23=
[10+2*(10+2*15)]*5-23=
[10+2*(10+30)]*5-23=
(10+2*40)*5-23=
(10+80)*5-23=
90*5-23=
450-23=
427

Answer 2

{10+2x[10+2x(150-15)]}x5-23=
[10+2x(10+2x35)]x5-23=
[10+2x(10+70)]x5-23=
(10+2x80)x5-23=
(10+160)x5-23=
170x5-23=
850-23=
=827