$4x^2-16x+7$
$6\left(2f+6g\right)$
$\lim_{x\to\infty}\left(\frac{3x}{\sqrt{9x^2+1}}\right)$
$a^4+a^2+1f$
$7-x^2-\:x\:para\:x=-2$
$secy\left(1+cot^2y\right)$
$-10m+25m^2+m^2$
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