$-2\sqrt[2]{5}+2\sqrt[2]{5}$
$\left(2a-5\right)\left(2a-5\right)$
$35-46$
$\left(6\:-\:x\:+\:y\right)\:\left(6\:+\:x\:+\:y\right)\:$
$-z-4z$
$a^2-2a-35$
$2\tan^2\left(x\right)-2\tan^2\left(x\right)\sin^2\left(x\right)$
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