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2\left(0+\frac{1}{2}+0\times 8+0\right)
Multiply 0 and 1 to get 0. Multiply 0 and 0 to get 0. Multiply 0 and 15 to get 0.
2\left(\frac{1}{2}+0\times 8+0\right)
Add 0 and \frac{1}{2} to get \frac{1}{2}.
2\left(\frac{1}{2}+0+0\right)
Multiply 0 and 8 to get 0.
2\left(\frac{1}{2}+0\right)
Add \frac{1}{2} and 0 to get \frac{1}{2}.
2\times \frac{1}{2}
Add \frac{1}{2} and 0 to get \frac{1}{2}.
1
Cancel out 2 and 2.
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