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Simplify by rationalizing the denominator.
Astrocytoma
A type of brain tumor that originates in astrocytes, which are star-shaped cells in the central nervous system.
Carcinogen
A substance capable of causing cancer in living tissue.
Carcinoma
A type of cancer that starts in cells that make up the skin or the tissue lining organs, such as the liver or kidneys.
Choriocarcinoma
A fast-growing cancer that occurs in a woman's uterus (womb), typically following a pregnancy or miscarriage, and is part of gestational trophoblastic disease.
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