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+(p [This paragraph contains this equation: ,(eq :inline? #t '(/ alpha
+beta)). This is actually an ,(emph [inline]) equation, meaning that it
+occurs within a paragraph. Typesetting has to be adjusted
+accordingly.])
+
+(eq-display
+
+ (p [This is an equation display block, within which equations can be
+aligned with one another.])
+
+ (eq :ident "eq-limit-b-over-l"
+ :renderer 'lout
+ :align-with '=
+ '(= (limit (/ lambda beta) 0
+ (apply IPL n k))
+
+ ;; non-simplified
+ (/ (expt (+ alpha beta) k)
+ (* beta
+ (sum :from (= x 0)
+ :to (- k 1)
+ (* (combinations k x)
+ (expt beta (- k 1 x))
+ (expt alpha x)))))))
+
+ [This equation can be simplified as follows:]
+
+ (eq :ident "eq-limit-b-over-l-simplified"
+ :renderer 'lout
+ :align-with '=
+ '(= ;; simplified
+ (/ (expt (+ alpha beta) k)
+ (- (expt (+ alpha beta) k)
+ (expt alpha k)))
+
+ (limit (/ lambda beta) 0
+ (apply IPL n k)))))
+