$\frac{x^2+1}{y^2+1}=1$
$\lim_{x\to0}\left(\frac{sinx}{38.4x}\right)^{\frac{1}{x}}$
$\lim_{x\to0}\left(\frac{6-6\cos\left(x\right)}{sin\left(5x\right)}\right)$
$\int\frac{8x-3}{\left(x^2-5x+6\right)}dx$
$2b^2-2a^2-2b^2-a^2$
$\frac{x}{x^2+4x+3}$
$-4m-3n$
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