$12-8-7+5-1$
$\int\frac{\left(x+8\right)}{\left(x\left(x+6\right)\right)}dx$
$\sqrt[4]{49a^{12}}b^9$
$27n\:-\:9t$
$\left(-10\right)\cdot12\cdot\left(-9\right)$
$4\cos x-2=0$
$-3+4+2+1$
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