$27\cdot\sqrt{9}-9-27$
$\left(x-\frac{3}{2}\right)^4$
$\left(16x-32y+17z\right)+\left(-28x-18y+27z\right)$
$\left(x^2+1\right)y'=x\left(y^3+y\right)$
$\left[\left(n+2\right)\left(n-2\right)\left(n^2+4\right)\right]^4$
$x^2-67x+12=3312$
$x^3\:+2x\:-x-2$
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