$\lim_{x\to o}\left(\frac{xlog\left(x\right)}{x^2}\right)$
$\frac{cosx+sinx}{sinx}=cot\left(x\right)+1$
$\left(7x+\frac{1}{\sqrt{3}}\right)^2$
$\lim_{n\to\infty}\:1^{2n+1}$
$x ^ { 3 } + \frac { 5 x ^ { 2 } - 9 x + 30 } { x + 7 }$
$2x^2-24$
$\left(x^2+hx+k\right)=\left(x-h\right).\left(x-k\right)$
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