$-21-\:15g$
$\int\left(\frac{1}{1-sinx+cosx}\right)dx$
$a^2+b^2+c^2=2$
$-70+30-9+10+15-25$
$2x\:+\frac{1}{2}x$
$3c^2-4c-4=0$
$x-x^7$
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