$c+4=7$
$\int\frac{\left(3x-4\right)}{\left(x+2\right)^2+7}dx$
$2^3-0.25$
$5+r=23$
$12=-8n-24-4n$
$y'+\frac{2y}{x}=3e^2$
$\lim_{x\to-1}\left(\frac{x^4+6x^3+4x+9}{x+1}\right)$
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