$8a+6b-6-\frac{1}{2}a-\frac{3}{5}b$
$2+5\left(8-2\right)$
$9x^2+42x-49$
$2cos\left(2x+1\right)\:+\:sin8x-1$
$18=g-11$
$8\left(8x-3\right)$
$\frac{1}{2}x+\frac{3}{3}y$
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