100+а

25+b

7-с

d+1

24m

100n

3x

10y

(64-54)*245 = 2450

99+1+a=100+а

16+b+9=25+b

34-(27+c)=34-27-c=7-c

(d+46)-45=d+46-45=d+1

8*m*3=24m

1)8*m=8m

2)8m*3=24m

n*25*4=100n

1)n*25=25n

2)25n*4=100n

5*x-2*x=3x

5*x=5x

2*x=2x

5x-2x=3x

9*y+y=10y

9*y=9y

9y+y=10y

245*64-245*54=245*(64-54)=2450