$35\cdot27$

$\:b^22b+1$

$\frac{1}{4}\left(x-\frac{2}{5}\right)\ge2.\left(\frac{1}{4}x+\frac{1}{5}\right)$

$\lim_{x\to0}\left(\frac{2sin\left(x\right)}{x^2}\right)$

$4\left(\frac{x}{8}-2\right)=\frac{1}{4}\left(2x-6\right)$

$f=3x^2y+xa$

$-\:-\:\left(-\:8\::\:2\:+\:5\right)\:-\:\left(-\:4\:-\:9:3\right)\:-\:\left(\:2\left(-\:5\right)\:+\:7\:\right)\:-\:\left(\:-12:\:4\:\right)\:-\:\left(-18\::\:9\right)$