$cos^3\left(80\right)+sin^2\left(80\right)\cdot\:\:cos\left(80\right)$
$2 ^ { 2 x } + 20 - 9 \cdot 2 ^ { x } = 0$
$\left(\frac{2}{5}a-3a^2\right)^3$
$\frac{x^2-2x+3}{x+1}$
$2x^2+8x-7=-2$
$\left(-35\right)\left(289\right)\left(-2\right)$
$6^2+4^2-2$
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