$2y\frac{dy}{dx}+1=e^{x-1}$
$\frac{1}{2}+\infty$
$\int e ^ { \frac { 1 } { 4 } x + 1 } d x$
$x+y;\:x=7;\:y=10$
$\frac{n^2}{4^n}x^n$
$\lim_{x\to-\infty}\frac{3x^4+x^2+1}{\sqrt{5}x^4+3}$
$x^2-5=2x+y$
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