$\sqrt{25a^4}$
$5+\sec\left(x\right)=9-7\sec\left(x\right)$
$\left(-15\right):5.12$
$29^0$
$\int\frac{x^2}{\sqrt{x^2-256}}dx$
$\frac{1+\sin x}{1-\sin x}=\left(\tan x+\sec x\right)^{2}$
$-975+48$
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