$\left(\frac{7}{5}x^2+\frac{1}{8}\right)\left(-\frac{7}{5}x^2-\frac{1}{6}\right)$

$5x^2-x\left(6x^2+2x-\left(3x^2-1\right)+10x\right)-5$

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

$\frac{13m}{5}\left(\frac{5m}{2}+\frac{2n}{3}\right)-\frac{3n}{17}\left(17+\frac{17m}{5}\right)$

$\left(-19+25-31\right)\cdot\left(-5-3\right)-128$

$\left(2b-2a+c\right)-\left(5b+3a-3c\right)$

$97.087-98.75$