$\left(5x-5\right)\left(5x-20\right)$
$\sin\left(\frac{90}{\frac{1}{64}.48}\right)$
$-12+53-\left(-36-\left(-11\right)\cdot7\right)$
$5x\:+6t+9t+3x-2x-8t-x$
$|\sqrt{ab}-2\sqrt{x^{4}y^{3}}|^{6}$
$a^2x^2+b^2y^2-b^2x^2-a^2y^2$
$61\cdot61\cdot61\cdot61\cdot61$
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