$\frac{10}{\left(2n-1\right)\left(2n+1\right)}$
$\left(2x^2-3x+2\right)\left(x+4\right)$
$81cos^2\left(t\right)$
$\left(np-11\right)^3$
$\left(2x\:-\:y^3\right)^3$
$\cosh\left(2x\right)=2\sinh^2\left(x\right)+1$
$a^2-22a$
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