$\left(3a-7\right)\left(-3a\right)$
$c+9c+3$
$\left(p-2q\right)^4$
$f\left(m\right)=m^5e^4^m+1ae\left(\frac{1}{3}m\right)$
$x^2+4x+4=9$
$\frac{sin\:\left(x-y\right)}{cos\:x\:\:sin\:y}=tan\:x\:\:cot\:y-1$
$\left(b+8\right)\left(b+9\right)$
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