derivate

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The student's painting showed a lot of originality, using unusual colors and techniques. "

"Before going to school, I brushed my teeth with toothpaste. "

"My life lacks excitement."

"This musical piece is a derivative of a popular folk song. "

"The leaky faucet in the kitchen is a problem that needs fixing. "

"He is a student of life."

"The student derived the answer to the math problem from the formula. "

"This manuscript is the original."

"The formula for calculating the area of a rectangle is length times width. "

"The students became active agents in their learning when they started choosing their own research topics. "

"Age had whitened his hair."