$3-\left(5-7\right)-\left(4+\left(-7\right)-3\right)+1$
$48,5-0,434$
$\lim_{x\to-1}\left(x^2-4x+3\right)$
$3x^3-26x^2+16x=0$
$8x-7=33$
$3a+b-2b$
$0.80\cdot3\frac{1}{3}$
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