$0,3+1,0$
$\int\left(\frac{7}{x^8}\right)dx$
$x^2+42x+84$
$x^2-6x+5<5$
$\frac{1}{4}x^2-7x+8+3x$
$\left(3x^2-1\right)^2-\left(3x+3\right)^2$
$\left(a^2-x^3\right)^2$
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