$9x^4+42x^2+49$
$-3z+4z$
$4\left(x+10\right)-2\left(x+22\right)$
$\left(-7x^3+2x^2\right)^3$
$\left(7y+5\right)\left(5+3y\right)$
$\tan=2\:$
$18x^2+99x-162=0$
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