$2x^4+4y^4$
$9+5^3$
$6+9-8+6-87$
$x^2+2=38$
$q\:+\:7p=\:z^3$
$7x\le7$
$\lim_{x\to2a}\left(\frac{x-2}{\sqrt{x}-\sqrt{2}}\right)^x$
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