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[tex]81 - 7 \times 11 = [/tex]


[tex]7 + 9 \times 6 - 12 {}^{0} = [/tex]


[tex]17 {}^{1} - 40 \div 5 = [/tex]

[tex]120 \div (4 + 4 \times 5) = [/tex]