Solve $\frac{xdx-ydy}{xdy-ydx}=\sqrt{\frac{1+x^2-y^2}{x^2-y^2}}$
61105
solve$\frac{xdx+ydy}{xdy-ydx}=\sqrt{\frac{a^2-x^2-y^2}{x^2+y^2}}$
9211
$\int\frac{dx}{x-3y}$ when $y(x-y)^2=x$?
98653
Easiest way to solve $y''+y=\frac{1}{\cos x}$
143878
Solve: $\int x^3\sqrt{4-x^2}dx$
144863
Finding integer solutions to $y^2=x^3-2$
99930
Find the Maximum value of $\frac{x}{\sqrt{x+y}}+\frac{y}{\sqrt{y+z}}+\frac{z}{\sqrt{z+x}}$
106934
$x^x=y$. How to solve for $x$?
78719
Solve the DE $yy^{\prime}+x=\sqrt{x^2+y^2}$
133164
Rational solutions for $x^2+y^2=3$
137963
Limit of $\frac{xy-z^2}{x^2+y^2+z^2}$ and $\frac{xy}{x^2+y^2}$ as $(x,y) \to (0,0)$
60589
Solve for $x$ in $6x^2-25x+12+\frac{25}{x}+\frac{6}{x^2}=0$
153377
How to solve $y^2=3x^4+3x^2+1$ for integers.
132108
How to solve differential equation $y=xy'+\frac12y'^2$
144841
Find general solution $y''y^3=1$
145444
Solve $\dfrac{1}{1+\frac{1}{1+\ddots}}$
157264
Solve $\frac1x+\frac1y=\frac1{pq}$
15753
Solve the following equation in positive integers $x$ and $y$