$4x^2-16+7$
$16t^2+60t+6$
$9\left(x-6\right)=18$
$9\left(r+2\right)+2\left(r-6\right)$
$\frac{4-6x}{5}\le\frac{1}{2}-3\left(2-3x\right)$
$4a^2-15a+9$
$\int\sin^42x\cos^22xdx$
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