(200-5²):15= 74+67x(43-7x6)-17 206-6x(59-7x8)-48 83-(6x7+12x4):10 4²+(150-4x25)x3 6x12-52:4 (25+75):(53-48) 126-10x2³ (8x7-50)x6:4 (125:25+50);11 2500:10²-5²

74+67x(43-42)-17=74+67x1-17=74+67-17=141-17=124 206-6x(59-56)-48=206-6x3-48=206-18-48=188-48=140 83-(6x7+12x4):10=83-(42+48):10=83-90:10=(-7):10=(-0,7) 4²+(150-4x25)x3=16+(150-100)x3=50x3=150 6x12-52:4=72-13=59 (25+75):(53-48)=100:5=20 126-10x2³=126-10x8=126-80=46