$sinx=0.722$
$\left(8x^3-14x^2-3x+9\right)\left(2x-3\right)$
$\frac{3a-b}{2}+\frac{3a-b}{2}$
$x^2+12x+35=0$
$\log_{10}1.2\cdot10^{-7}=x$
$\lim_{x\to7}\left(2x+1\right)x-7$
$15\left(-23+\:6\right)\:$
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