$-\sqrt{18}+\sqrt{2}$
$\:\left(5x+1\right)\left(25x^2-5x+1\right)$
$\lim_{x\to0}\left(\frac{e^x-\left(1-13x\right)}{x}\right)$
$\frac{7^{8x+6}}{5^{3x-2}}$
$\frac{\left(cos^2x\cdot\:\:tan^2\left(-x\right)-1\right)}{cos^2x}=-1$
$46-\left(-10\right)-\left(-25\right)-\left(-55\right)-\left(-5\right)$
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