$-\frac{1}{2}\cos\left(x\right)=-1$
$5cosx+6=10cosx+5$
$-5b-3b+2c+2c$
$2a+3a+a$
$\left(x\:-\:7ab^2\right)^3$
$\left(a^4+8\right)\left(a^5-1\right)$
$2x-1=x+4$
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