Handling $\frac{dy}{dx}$ as a ratio.
3360
Is $\frac{\textrm{d}y}{\textrm{d}x}$ not a ratio?
85386
Differential equation $y''=\frac{y'}{2\sqrt y}$
42462
Use a linear approximation to estimate the number $64.07^{2/3}$
120088
How do I calculate a double integral like $\iint_\mathbf{D}e^{\frac{x-y}{x+y}}dx\,dy$?
2676
Finding $\frac {d(\tan \theta)}{d\theta}$
138766
Nondimensionalizing a differential equation
104158
$\frac 00=$ ? Why It is un answerable?
9211
$\int\frac{dx}{x-3y}$ when $y(x-y)^2=x$?
62055
Solve $\frac{d}{dx}f(x)=f(x-1)$
123602
Non integer derivative of $1/p(x)$
27127
Calculating $\iint (x+y) \, dx \, dy$
17852
$\int \frac{dx}{x\log(x)}$
75791
What is the proper way to handle the limit with little-$o$?
140352
How can I take a sensitive result for this equation?
21649
P.d.f of the absolute value of a normally distributed variable
12288
Ratio of Gamma distributed variables with different parameters
61328
Resolve $\lim_{x \to 0} \frac {\tan 3x}{\tan 5x}$