$x^2-14x-196$
$\cos\left(\frac{\pi}{2}-a\right)$
$7\:-3\left(r\:+\:2\right)$
$\left(a\:-\:b\:+\:c\:-\:d\right)^2$
$400\cdot60$
$2x-8\ge9x-70$
$\left(\sqrt[5]{a}\right)^5$
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