$100-27\cdot3$
$f\left(x\right)=\sqrt{1}-5$
$-321+28$
$\sin\left(x\right)\cos\left(x\right)=\frac{327}{1000}$
$10b+5+5+7b+1$
$2\left(3\times\frac{6}{9}+25\right)$
$\frac{x^2-4x-5}{25-x^2}$
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