$-5-7+1+-3+4+1-2+2+14-2-4$
$\lim_{x\to3}\left(\frac{x^2-9}{x^2-x-9}\right)$
$e^{\frac{x^2}{2}+2x}$
$\frac{sin^2x}{tan^2x}=\frac{1+cos\:2x}{2}$
$\int y^3sen\left(y^2\right)dy$
$\frac{2x-3}{4}+6>2\:+\frac{4x}{3}$
$3x+11<5$
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