$\cos\left(\frac{x}{3}\right)=-0.7$
$2x-4<x+3$
$3a+5b-5a+4b-13a$
$2-2\left(x+6\right)<2+x$
$\int\frac{3x-7}{2x^3-18x}dx$
$4a^2-5a-7$
$\int\left(\frac{3x^2-21x+32x}{x^3-8x^2+16x}\right)dx$
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