$-\frac{1}{x-1}=-6-\frac{2}{x-2}$
$\:2x-3y-4x-5y-7$
$0,283+35$
$3\sin-5\:=\:-2\sin$
$3d+2d+0.95$
$\left(\left(\frac{1}{3}\right)a+\left(\frac{1}{2}\right)b+c\right)^2$
$\frac{u}{10}-90=30$
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