$\frac{16x^2-77x+100}{7x^2-x}$
$\left|\left(x^{-4}\right)^{\frac{1}{5}}\right|^{\frac{1}{6}}$
$6sin\left(2x\right)=0$
$-\frac{192}{-8}$
$xy+4;\:x=7;\:y=10$
$4a-28=-12$
$83^2-67^2$
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