$x^4-1<0$
$\frac{d}{dx}\left(x^2y^3+x^2y=2+x+3y\right)$
$\int_0^{\frac{\pi}{2}}\left(sin2xcosx\right)dx$
$b^2+20+b$
$\left(2-\frac{3x^2}{2}\right)^4$
$7^5$
$x^2+26x+169=0$
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