$\{53\times2+20-5\times[9\times5-12\times\left(10\cdot49+7\right)]-183+\left(248+6\right)$

$\left(b^{\frac{3}{\frac{4}{b^{\frac{1}{2}}}}}\right)^{\frac{1}{2}}$

$\lim_{x\to3}\left(\frac{x^2-9}{2x^2+7x+3}\right)$

$6\sqrt{2}-7\sqrt{2}$

$\sqrt[2]{3}.\sqrt[2]{3}$

$\frac{6.0451\cdot10^{12}}{\left(5.109\cdot10^{-15}\right)\left(5.472\cdot10^5\right)}$

$\left(8p^4q^3\:+\:3p^5q^2\right)\:$