#spanend &spanadd; dh(t) = d(f(t)g(t)) = df(t)g(t) + f(t)dg(t) + df(t)dg(t) = df(t)g(t) + f(t)dg(t)&spanend; #spanadd /home/limg/www/LimgMath/eq! You can't use `macro parameter character #' in math mode.
\displaystyle \mathstrut ##
spanend &spanadd; dh(t) = d(f(t)g(t))...
l.17 \end{align*}
#spanend &spanadd; df(t) = d\left(\ffd{h(t)}{g(t)}\right) = \ffd{dh(t)g(t) - h(t)dg(t)}{g(t)^2}&spanend; #spanadd /home/limg/www/LimgMath/eq! You can't use `macro parameter character #' in math mode.
\displaystyle \mathstrut ##
spanend &spanadd; df(t) = d\left (\ff...
l.17 \end{align*}
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