$x^{\left\{x+1\right\}\text{left}\left(x+1\text{right}\right)^x}$

$12-\left\{8-\left\{7-10\right\}+\left\{2-6\right\}\right\}$

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

$x+94=300$

$\lim_{x\to-\infty}-\frac{x}{3^x}$

$\left(-30\right)\left(7\right)\left(-4\right)$

$\left(2x-5\right)^2$