[最も好ましい] (x y)^2 (x-y)^2 formula 311172 blogjpmbaheenwt

Y'\frac {4} {x}y=x^3y^2, y (2)=1 laplace\y^ {\prime}2y=12\sin (2t),y (0)=5 bernoulli\\frac {dr} {dθ}=\frac {r^2} {θ} ordinarydifferentia...