$\int-\frac{2}{3}x\cos\:\left(3x\right)dx$

$\frac{y}{4}=-7$

$\int_x^{\infty}\left(\frac{\ln\left(x-1\right)-\ln\left(x+1\right)}{2}\right)dx$

$3x\ge6x+9$

$\lim_{x\to\infty}\left(\frac{x^3+x}{x^3+1}\right)$

$2mx+6\left(b^2+c^2\right)\:-4d^2;\:a=3\:;b=4\:;c=\frac{1}{3}\:;d=\frac{1}{2}\:;m=\frac{1}{2}$

$\left(5xz-3\cdot n\right)^3$