$-68-1+\left(6\right)$
$\left(4x^2+10\right)\left(4x^2+c\right)$
$cos2x\:+\:2\:cos\:x\:+\:1\:=\:0$
$35y^3-90y^2-45y$
$208\cdot30$
$16-24z+z^2$
$\left(2x+1\right)^2\left(3x^2-2\right)^3$
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