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Answer:
[tex]8(2 +5) \\ 16 + 40[/tex]
[tex](7 \times 4) \times 3 \\ 7 \times (4 \times 3)[/tex]
[tex]8 + 5 \\ 5 + 8[/tex]
[tex]-4(1) \\-4 (\frac {3}{3})[/tex]
[tex]25 + ( - 25) \\25 + 25[/tex]