$-16-\left(-9\right)$
$\int\left(x+1\right)\cdot e^{-2\ln\left(x\right)}dx$
$13b+10b-7b\left(b=2\right)$
$\int\frac{cos\left(x\right)\cdot sen\left(x\right)}{1-cos\left(x\right)}dx$
$74\cdot95$
$a^6+2a^3+1$
$15x^3+78x^2-31x+49\cdot9x^2$
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