$\left(4t-1\right)^2$
$w^2-8w+16=0$
$\left(\sec x-1\right)^2$
$-2w=-20$
$7a\left(3b-2c+4\right)=0$
$\left(2\sqrt{3}\right)\sqrt{6}$
$-2a-17=11$
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