4) \( \left(2 x^{2}-6 x^{3}+1\right)+\left(3 x^{3}-5-3 x^{2}\right) \)

9. O'rmonchi va uning yordamchisi yumaloq yalanglikdagi daraxtlarni sanashi kerak. Ular bu yalanglikning har xil joyidan, lekin bir tomonga qarab yurib borishyapti. O'rmonchi uchun yettinchi bo'lgan daraxt uning yordamchisi uchun yigirmanchi bo'ldi, yordamchi uchun yettinchi bo'lgan daraxt esa o'rmonchi uchun 93-bo'ldi. Bu yalanglikda nechta daraxt bor ekan?

2 Write in the form of a single power then simplify if it's possible. \( A=(-3)^{2} \times(-7)^{2} \). \( B=\left(\frac{1}{2}\right)^{4} \times\left(\frac{4}{3}\right)^{4} \). \( \mathrm{F}=\frac{\left(\frac{3}{5}\right)^{7} \times(2.1)^{7}}{(-2)^{7}} \). \( C=(-2)^{3} \times\left(\frac{5}{2}\right)^{3} \). \( \mathrm{G}=\frac{\left(\frac{3}{5}\right)^{4}}{\left(\frac{-2}{5}\right)^{4}} \). \( D=\left[\left(\frac{-3}{5}\right)^{4}\right]^{5} \). \( \mathrm{H}=\left[\left(\frac{a}{b}\right)^{2}\right]^{3} \times\left(\frac{a}{b}\right) \) \( \mathrm{I}=\left(a^{3} \times a\right)^{2} \).

If \( \frac{1}{\log _{3} \pi}+\frac{1}{\log _{4} \pi}>x \), then \( x \) can be

An apple costs \( \$(x+1) \). Rachel has \( \$\left(7 x^{2}+x-6\right) \). Show that she can buy a total of \( (7 x-6) \) apples if she spends all her money.

\( 25 \sqrt { \frac { x ^ { 2 } y ^ { 4 } } { z ^ { 3 } } } \cdot \sqrt { \frac { x ^ { 6 } y ^ { 8 } } { z } } \quad [ \frac { x ^ { 4 } y ^ { 6 } } { z ^ { 2 } } ] \)