$\frac{b^2+6b+8}{3b^2+12b}$
$+3\left(-4\right)+5+\left(-7\right)$
$\ln\left(t\sqrt{4-t^2}\right)$
$tany=2.4142$
$f\left(x\right)=3x^3-9x$
$\frac{6}{\left(1-x\right)}\ge7+\frac{4x}{\left(1-x\right)}$
$-893.15-305.35$
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