19 / 25 * 76 (3 / 7-1 / 34) * 7-27 / 34 can be easily calculated, thanks

one
76=4*19
19/25*76=19/19/(4*25)=1/100
two
（3/7-1/34）*7-27/34 =3/7*7-7/34-27/34
=3-(7/34+27/34)=3-1=2

-27 (x-1) ³ = - 1000

(x-1)³=-1000/-27=1000/27=(10/3)³
x-1=10/3
x=13/3

Calculate this problem, 1 / 1000 (0.1 x + 10) = - 27

1/1000*(0.1x+10)^3=-27
[(1/10)*(0.1x+10)]^3=(-3)^3
(1/10)*(0.1x+10)=-3
0.1x+10=-30
0.1x=-40
x=-400

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