$-42\:x\:-6$
$\left(7x+1\right)\left(x^4-x^3-9x\right)$
$-10a^3b-15a^3b+26a-12a$
$\int_0^2ydy$
$32^{25^{-2^{-1}}}$
$-4\left(-7s+5\right)-9s$
$3+5x+4$
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