$\lim_{x\to0}\left(\frac{x-3-\sqrt{5}}{x}\right)$
$25x^2\:+20x\:+\:4$
$\left(m^2+5m+5\right)^2$
$sin\left(30\right)=\frac{y}{1}$
$10x^3y-15x$
$7sec\left(x\right)+4=18$
$2x^2-14x+24=0$
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