$4x\:+\:4=5x+3$
$\frac{3}{7}\sqrt{6}+\frac{1}{2}\sqrt{600}-2\sqrt{0.06}$
$-7w-5+17w+15$
$-4a^2b\:.\:-ab^2$
$x^2+81y^2+36y^2$
$\frac{1}{8}x-4=3$
$7^4-5^4$
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