$\lim_{x\to-\pi}\left(\frac{4\cos\left(x+4\right)}{\left(x+\pi\right)^2}\right)$
$32\cdot80$
$y'+2yx^2=x^2$
$4x^2-12x+4$
$x^2+y^2-1-2xy$
$-5x-3$
$-5\:-4\:-3\:-36\:-2\:+9\:+9\:+25\:+18$
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