$r^{16\:}\:-\:16s^8$
$-5x>-10$
$2x^2+4x-140=0$
$sin^{-1}\frac{28.3}{53.1}$
$\left(x^8+4\right)\left(x^8-4\right)$
$12.01\:-\:4.897$
$-49+25a^440a^3+16a^2$
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