$5\left(x+y\right)-4x-y$
$\left(7x^3-13\right)\left(7x^4+13\right)$
$x^2+26x+144$
$\frac{a}{b}-\frac{2a}{3b}$
$\left(2^3x\:2^4x\:2\right)$
$\frac{\left(10x^3y^5\right)\left(21x^2y^6\right)}{\left(7xy^3\right)\left(5x^9y\right)}$
$-\left(30+26-93\right)-\left(15-16\right)$
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