$x^2\le3-2x$
$6x-x^2+9$
$\left(\frac{4}{7}+x\right)^2$
$\int t\sin^{-1}\left(x\right)dx$
$\int_4^8\left(\sqrt{x^2-15}\right)dx$
$\cos\left(4a\right)=\left(\cos2a^2\right)-\left(\sin2a^2\right)$
$=\frac{x^{2}-3}{x^{2}+2}$
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