$m^2+23m+132=0$
$\left(\frac{\cos\left(a\right)}{\sec\left(a\right)}\right)+\left(\frac{1}{\sec^2\left(a\right)}\tan^2\left(a\right)\right)$
$3x^2-6x^3$
$\lim_{x\to7}\left(\frac{cosx}{1-sinx}\right)$
$81-121a^2b^2$
$\int\frac{\sin\left(x\right)}{1-\cos\left(x\right)}dx$
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