$-x^2;x=1$
$36x^2-96x+64$
$\left(f^{-1}g^0h^{-1}\right)\left(f^9g^7h\right)\left(f^{-4}g^{-1}h^0\right)$
$\lim_{x\to0}\frac{\left|5x-1\right|-\left|5x+1\right|}{x}$
$y=-5x^2+3x-4$
$\frac{8x^3+18x^2+13x+9}{4x+3}$
$3x^2+8x+3=0$
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