(2-((-5×7)--13))
((2-(-5×7))+-13)
(2-((7×-5)--13))
((2-(7×-5))+-13)
(2+(-13-(-5×7)))
((2+-13)-(-5×7))
(2+(-13-(7×-5)))
((2+-13)-(7×-5))
(-13+(2-(-5×7)))
((-13+2)-(-5×7))
(-13+(2-(7×-5)))
((-13+2)-(7×-5))
(-13-((-5×7)-2))
((-13-(-5×7))+2)
(-13-((7×-5)-2))
((-13-(7×-5))+2)
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