$f\left(0\right)=4\cos\left(0\right)$
$x^2-3x-4<0$
$16a^2-6ab^2+\frac{36}{64}b^4$
$\left(6a+12an\right)$
$\sqrt[4]{27.3}$
$\frac{d}{dy}\left(y^4+x^2-z^3+3xy^2=8\right)$
$x^5+x^4+x$
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