$\left(5a^3+\frac{1}{2}a^5\right)^2$

$7,5\cdot7$

$\frac{1+\cot^2x}{2\cot^2x}=\frac{\sec^2x}{2}$

$\lim_{h\to0}\left(\frac{\left(h+1\right)\frac{1}{3}}{h}\right)$

$-4\:+1\:-\:2\:^2\:+3+1^4$

$f\left(x\right)=\left(-8^{-4}+x^{-3}-2\right)\left(7x^{-2}+x\right)$

$-4\cdot9+7$