Решите срочно номер 2 прошу!!!!Очень надо.

$2. \\ 1) (\frac{3}{7})^{2-5x} \geq (\frac{49}{9})^{-5} \\\\ (\frac{3}{7})^{2-5x} \geq (\frac{9}{49})^{5} \\ \\(\frac{3}{7})^{2-5x} \geq (\frac{3}{7})^{2*5}\\\\ 2-5x \geq 10\\\\ -5x \geq 8\\\\ x \geq -\frac{8}{5}\\\\\$
$2) (\frac{3}{4})^{x^2} \geq (\frac{3}{4})^{2x+3} \\\\ x^2 \geq 2x+3 \\\\ (x-3) (x+1) \geq 0 \\\\ x \geq 3\\x \leq -1\\\\\$
$3) 5^{\frac{x}{3}} \geq 5^{\frac{3x+4}{2}} \\\\ {\frac{x}{3}} \geq {\frac{3x+4}{2}} \\\\\ I'm ...sorry........ I... can't ...solve... third:($
$4) (\frac{2}{3})^{x^2} \leq (\frac{2}{3})^{x+2} \\\\x^2 \leq x+2 \\\\ (x-2) (x+1) \leq 0 \\\\x \geq -1 \\x \leq 2\\\$
Остальное трудное прости.............