\[10+6\times \frac{-8}{2}(-25)\times -10+5\]

1
Use this rule: ab×cd=acbd\frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}.
10+6×8×25×102+510+\frac{6\times -8\times -25\times -10}{2}+5

2
Simplify  6×86\times -8  to  48-48.
10+48×25×102+510+\frac{-48\times -25\times -10}{2}+5

3
Simplify  48×25-48\times -25  to  12001200.
10+1200×102+510+\frac{1200\times -10}{2}+5

4
Simplify  1200×101200\times -10  to  12000-12000.
10+120002+510+\frac{-12000}{2}+5

5
Move the negative sign to the left.
10120002+510-\frac{12000}{2}+5

6
Simplify  120002\frac{12000}{2}  to  60006000.
106000+510-6000+5

7
Simplify  10600010-6000  to  5990-5990.
5990+5-5990+5

8
Simplify.
5985-5985

Done

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