$3-2^2-5-23$
$\frac{\frac{1}{\sin\left(x\right)}-\sin\left(x\right)}{\cos\left(x\right)}$
$-\left(x-4y\right)^2$
$64x^4-128x^2+64$
$8 x ^ { 3 } + 6 x$
$x^{\log_x\left(x^2+9+6x\right)}=16$
$\left(-\frac{4}{5}pq^2\right)^2$
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