$x^m\cdot x^{m-1}$
$3t-153\le-159$
$170+90$
$3+4^2\cdot3-\sqrt{36}+15^0$
$5x+4y+8x-2y$
$3\sin\left(x\right)-2=1$
$x^2-20x+11=0$
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