$2x^2-x-18<0$
$2x-6x^2-x$
$a^7a^{12}$
$6+6\cdot3-16$
$\left(x-7\right)+7\left(x-7\right)+6$
$\frac{\sin\left(c\right)}{\csc\left(c\right)}+\frac{\cos\left(c\right)}{\sec\left(c\right)}=1$
$\frac{1}{3}x^2+\frac{4}{3}x+1$
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