Question 1: You are right, it's hard to enunciate the 'd' on the end of 'considered' when it's followed by a word such as 'to'. I think that in this instance, the 'd' can be enunciated softly. Question 2: 'find out', as in 'I'll try to find out if today's newspaper has arrived' - it's important to the pronounce the 'd' clearly in this instance, because 'I'll try to fine out if today's newspaper has arrived' would not make sense.
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