$0=3sin^2x-14sinx-5$
$\:\frac{\sqrt{5.75+30-6}}{5.75-6}$
$2x^2e^x-8e^x=0$
$42^2-38^2$
$x^2+10x=5$
$16w^2+40wr^2+25^4$
$x^2+1=\ln5xy^2$
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