$\sin\left(\arctan\left(x\right)\right)=\frac{x}{\sqrt{1+x^2}}$
$27x^3+y^3$
$\frac{d}{dx}\left(y=\frac{\cosh\left(x\right)}{1+\mathrm{sech}\left(x\right)}+\log\left(\mathrm{sech}\left(x\right)+\mathrm{sech}\left(3x^2+1\right)\right)\right)$
$14x\:+\:9=22x+1$
$\left(2xy^3-5y^5\right)^2$
$\frac{7}{\cos\left(45\right)}$
$\left(35bc+2c\right)\left(12bc+6\right)$
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