1) \( 3 x+5 x-2 x \) 2) \( 2 a+3 b-a+4 b \) 3) \( 7 x^{2}-3 x+4 x^{2}+x \)

Which is an equivalent expression for \( \left(3^{2} \cdot 5^{4}\right)^{3} ? \) \( 3^{2} \cdot 5^{12} \) \( 3^{5} \cdot 5^{7} \) \( 3^{6} \cdot 5^{12} \) \( 15^{18} \)

\( \frac { 1 } { r } \times \frac { 1 - ( \frac { 1 } { r } ) ^ { n } } { 1 - \frac { 1 } { r } } \geq \frac { 9 r } { 100 } \Rightarrow 1 - \frac { 1 } { r ^ { n } } \geq \frac { 9 r } { 100 } \)

Solve the Quadratic Equation From Fist Pinciple. \[ y=a x^{2}+b x+c \] to \( y=\frac{-b \pm \sqrt{4 a c}-b^{2}}{29} \)

8. \( \left(4^{\frac{1}{5}}\right)\left(4^{\frac{3}{10}}\right) \)

Evaluate \( \left(\frac{3.5^{7}}{3.5^{6}}\right)^{2} \)