llama@llama:~$ apt list --installed | grep ruby
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
libruby2.1/unstable,now 2.1.5-4 amd64 [installed,automatic]
libruby2.2/unstable,now 2.2.3-2 amd64 [installed,automatic]
ruby/unstable,unstable,now 1:2.2.4 all [installed]
ruby-dev/unstable,unstable,now 1:2.2.4 all [installed]
ruby-minitest/unstable,unstable,now 5.8.3-1 all [installed,automatic]
ruby-power-assert/unstable,unstable,now 0.2.6-1 all [installed,automatic]
Javascript (ES6), 453 426 bytes
The first and most obvious solution that came to my mind is one that looks around the slides and then merges or replaces.
a=>{b=(d,e,f)=>d.substr(0,e)+f+d.substr(e+(''+f).length);g=0;a=a.split`
`.map(h=>h.replace(/o/g,'1'));j=i=>i.match(/[0-9]/);k=' ';while(!g){g...
Ruby, 95 bytes
->a{x,y=a.split('/').map{|z|z.split("")};eval(a+".0=="+(x-y).join("")+"/"+(y-x).join("")+".0")}
Explanation
->a{ # start of lambda
a.split('/') # splits input fraction into numerator a...
