$1.025^8\cdot800$
$4a^2-12a^3+20a^5$
$\cot x\:+\frac{senx}{1+cosx}=cosx$
$\left[-2ab^3\right]^{-3}$
$x^2+11x+22$
$\int\arctan\left(z\right)dz$
$-7x+9x^2+4x^2+18x$
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