$27\:+\:y\:=\:\:-\:13$
$\frac{x}{x+3}+\frac{x}{x+2}$
$-44x^2+4+121x^4$
$51^22^33$
$y'\:+y=yxe^{x+2}$
$2x^2+16x=0$
$3x+1=\frac{6}{x+2}+2x$
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