200: 2*(540+460): 10= 200: 2*540+460: 10= 200: 2*(540+460: 10)= 1200-200: 40*5*5= 1200-200: (40*5)*5= (1200-200: 40)*5*5=

200:2*(540+460):10=200:2*1000:10=10000

200:2*540+460:10=100*540+46=54046

200:2*(540+460:10)=200:2*586=58600

1200-200:40*5*5=1200-5*5*5=1075           

1200-200:(40*5)*5=1200-200:200*5=1195         

(1200-200:40)*5*5=1195*5*5=29875