$x\left(x-7\right)\le0$

$8c+\left(2-4c\right)=10$

$-15+8-7+6-5^2$

$\frac{sin\left(x-y\right)}{cosx\:siny}=tanx\:cot-1$

$\left(\frac{1}{6}x^2-4\right)\left(\frac{1}{6}x^2+4\right)$

$\left(x^2-3\right)\left(x+4\right)\left(x-5\right)\left(x+1\right)$

$49q^8+16b^4-56b^2q^4$