$\:10x-9x-11=24\:$
$\lim_{x\to-1}\sqrt{4x^2-5x}$
$\frac{1+csc\left(t\right)}{sec\left(t\right)}-cot\left(t\right)=cos\left(t\right)$
$x^2+30x+64$
$\left(n^2+6n-27\right)+\left(n-3\right)$
$y+y+2f$
$x^2-5x+0$
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