$\sin2x=5\sin x$
$x^2+x-10100$
$\sqrt{x+6}=x$
$\left(5x\:+\:4\right)\:\left(5x\:+\:8\right)$
$\lim\:\:_{x\to\:\:0}\:1+x-e^x\sin^2x$
$\left(2a+3\right)\left(4a^2+6a+9\right)$
$0.8+10$
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