$\left(\frac{5x^2-y}{2x}\right)^2$

$\left(x-7\right)\left(x-2\right)\left(x+2\right)$

$3xy\left(4xy^2+5y-6x^2\right)$

$49+14\left(m+2\right)+\left(m+2\right)$

$l\lim_{x\to\frac{\pi\:}{2}}\left(\frac{\ln\left(\sin\left(x\right)\right)}{\left(\pi\:-2x\right)^2\:}\right)$

$\left(-\frac{1}{3}a\right)\cdot15$

$\left|0.7\right|=0.7$