$0,86-1,356$
$x=-x^2-3x+2$
$3y+52^2$
$\left(6x-1\right)\left(2x-7\right)$
$4+13+1+-8$
$\frac{\cos\left(x\right)+\sin\left(x\right)}{\cos\left(x\right)}$
$\left(2d+f\right)^2$
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