$x^2\le182$
$\int\left(\frac{\sqrt{4x^2+1}}{x^4}\right)dx$
$3+5cos2x=1$
$\left(2cos^2x-1\right)^2$
$-a+\frac{3}{11}a$
$f\left(x\right)=3\left(x-5\right)^2-12$
$\sqrt{-40}$
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