$x\cdot\sin-\left(4x\right)+\cos-1\left(4x\right)$
$\left(4xy^2+5wz^2\right)^2$
$\int\frac{2t^2}{3+2t^3}dx$
$3x^2-16x+16=0$
$p^4+4p^2-5\:$
$4.5+1.7$
$9-16x^6$
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