Problem: Thefirstlinkisanaudiofilefromthebordercrossing(yes,hugemomentforme).
What's a sentence that uses these characters?
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The first link is an audio file from the border crossing (yes, huge moment for me).

Problem: ItisrecommendedtosubmittheeTAapplicationatleast72hourspriortotravel.
What's a sentence that uses these characters?
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It is recommended to submit the eTA application at least 72 hours prior to travel.

Problem: Fromtheconditions1)and2)Lorentz'stransformationequationscanbededucted.
What's a sentence that uses these characters?
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From the conditions 1) and 2) Lorentz's transformation equations can be deducted.

Problem: Asthereis,inthegravitationalfield,anenergydensitythiscorrespondstoanequivalentmassdensityasgivenby(62).
What's a sentence that uses these characters?
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As there is, in the gravitational field, an energy density this corresponds to an equivalent mass density as given by (62).