$e^{-st}\left(e^{-3t}\right)$
$\left(2b\right)^9$
$\cos\left(2y\right)+1$
$3x+5y-8=0$
$\left(\left(\sin\left(x\right)+1\right)\right)\left(\cos\left(x\right)-1\right)$
$2x^2-14x+9=0$
$b^4+2b^2+9$
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