$y-x=4$
$-2ab-b^2-a^2$
$2b^3+b^2$
$5,\:457\:+\:0,14325\:+\:8,345$
$\left(2n-10\right)^2$
$0=3sin^2x-14sinx-5$
$-s-4s-7s$
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