$22-\left(-4\right)\cdot\left|6-\left(-3\right)\right|$

$\frac{32c^{18}d^{2}}{2c^{15}d^{5}}$

$55,13-44,50$

$-14k+\left(-7\right)k+15k$

$\left(\frac{3}{2}y-\frac{1}{3}x\right)\left(-\frac{4}{5}x-\frac{1}{2}y\right)$

$\frac{x^4+2x^3-1}{x^2}$

$\lim_{x\to\infty}\left(\frac{\left(2x+1\right)-\left(\sqrt[2]{x^3+1}\right)}{\left(x^2+1\right)^4}\right)$