$0.70-0.25$
$121+129\cdot6+81\cdot12$
$3\sec\left(x\right)^3-2\tan\left(x\right)^2-4$
$4x+24\:\cdot\:6$
$\left(z\:+\:f\right)\left(z\:+\:g\right)$
$1+\frac{x}{6}+\frac{7x^2}{12}$
$3x-4x^3+8-2x^3-5x$
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