$\frac{45a^2-15a-5}{-5a}$
$64x^3+128x^2-25x-50$
$x+14=3$
$\arccoth\left(\sqrt{4}\right)$
$2y-3y-xy-3y$
$\int_2^x\frac{1}{y^4+4}dy$
$a-b-a+b$
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