$\lim_{x\to3}5$
$\tan\left(65\right)=\frac{x}{43}$
$\:k^2-14k-68=-2$
$10=\frac{b}{12}+8$
$ay^{2-12ayx+36ax^2}$
$a^2+2a+144$
$\lim_{x\to0}\frac{3x^3+2x^2-3x}{x}$
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