$\frac{dy}{dx\:}=\frac{e^y}{y^2}$
$2x^2+9xy+5xy-7x^2$
$27+343m^{12}$
$k^2\:13k\:+\:40$
$\int\frac{x+1}{\left(x^3-2x^2+4x\right)}dx$
$3k<27$
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