Please capitalize where necessary: but precisely because dufour has cut down on number of dancers, there are two changes compared to tisserand and silvestre:
A: But precisely because Dufour has cut down on number of dancers, there are two changes compared to Tisserand and Silvestre:
Q: you will have to help her choose the dress code to be the most beautiful princess barbie.

A: You will have to help her choose the dress code to be the most beautiful princess Barbie.
Q: after his return from italy, goethe, christiane vulpius took a young woman into his house, whom he married in 1806, finally.
A: After his return from Italy, Goethe, Christiane Vulpius took a young woman into his house, whom he married in 1806, finally.
Problem: methionine supplements have shown good effects in hepatitis caused by medicine (halothane hepatitis).
Can you repeat this sentence, but capitalize it?
Answer: Methionine supplements have shown good effects in hepatitis caused by medicine (halothane hepatitis).
Text: again, friction applies the necessary torque, and to increase this torque, the stem of a typical tippe top is normally grooved to increase friction between the stem and the surface, as can be seen on the picture at the top of this page.

Correct capitalization: Again, friction applies the necessary torque, and to increase this torque, the stem of a typical Tippe Top is normally grooved to increase friction between the stem and the surface, as can be seen on the picture at the top of this page.
Text: morning temperatures will be around 14 °c. during the day they will reach a maximum of 29 °c. low temperatures at night will be around 18°c. we have weak northeasterly winds.

Correct capitalization:
Morning temperatures will be around 14 °C. During the day they will reach a maximum of 29 °C. Low temperatures at night will be around 18°C. We have weak northeasterly winds.