$\left(-\frac{3}{4}a\right)+\left(a\right)$
$6x-4\ge4x+8$
$140,30\:\left(7\right)$
$\int_{-180}^{180}\left(sen\:x\right)dx$
$b2\pi1$
$x^4-3x^2+x,\:para\:x=-3$
$\sqrt[3]{162x^{12}}y^{17}$
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