(2) \( \operatorname{tg} x=\frac{3}{1}, \pi

Given that \( f(x)=2 x-1 \) and \( g(x)=1-x \), find the composition function \( (f \circ g)(x) \). \( (f+g)(x)= \) (Enter your solution as a fully simplified expression.) \( (f-g)(x)=\square \) (Enter your solution as a fully simplified expression.) \( (f \circ g)(x)= \) (Enter your solution as a fully simplified expression.) \( (f \circ g)(-2)=\square \) (Simplify your solution completely.)

Identify the coefficient and the degree of each term \( 31 x^{2} y^{7}-5 x^{3} y z-1 \) The coefficient of \( 31 x^{2} y^{7} \) is 31 The degree of \( 31 x^{2} y^{7} \) is 9 The coefficient of \( -5 x^{3} y z \) is -5 . The degree of \( -5 x^{3} y z \) is 5 . The coefficient of -1 is -1 The degree of -1 is \( \square \).

(b) It is given that \( P=2^{2} \times 3^{a} \times 5^{2} \), where@is an integer greater than 3 . Find, in terms of \( a \), the lowest common multiple (LCM) of \( P \) and 720 . Give your answer as a product of its prime factors, in terms of \( a \), where necessary.

Write in simplified radical form with at most one radical. \[ \sqrt[5]{v^{2}} \cdot \sqrt{v} \] Assume that the variable represents a positive real number.

Write in simplified radical form with at most one radical. \[ \sqrt{v} \cdot \sqrt[7]{v^{2}} \] Assume that the variable represents a positive real number.