$2\left(x+3\right)+5\left(x-2\right)<2x-1-2\left(x-3\right)$
$\int\sec^8xdx$
$-3\sin a=9$
$6\cdot\left(5+4\right)$
$\left(x-13\right)\left(x+13\right)$
$-53-\left(-74\right)$
$-z+y-3z=-1$
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