[1.9+1.9*(4.8-3.81)]/(2.9-2.8)
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[1.9+1.9*(4.8-3.81)]/(2.9-2.8)[1.9+1.9*(4.8-3.81)]/(2.9-2.8)[1.9+1.9*(4.8-3.81)]/(2.9-2.8)[1.9+1.9x(
[1.9+1.9*(4.8-3.81)]/(2.9-2.8)
[1.9+1.9*(4.8-3.81)]/(2.9-2.8)
[1.9+1.9*(4.8-3.81)]/(2.9-2.8)
[1.9+1.9x(4.8-3.81)]/(2.9-2.8)
=[1.9+1.9x0.99]/0.1
=[1.9+1.881]/0.1
=3.781/0.1
=37.81
(1.9+1.9x0.99)/0.1=(1.9+1.9-0.019)x10=3.781x10=37.81
[1.9+1.9*(4.8-3.81)]/(2.9-2.8)
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