$\frac{x-8}{7}=\frac{x-9}{8}$
$-2\sin\left(x\right)+\sqrt{2}=0$
$\left(2+x^2\right)^4$
$\int\sqrt{x^3+7}\cdot3x^2dx$
$2x^2+\left(4x-6x^2\right)+9-\left(6x+3\right)$
$\left(-1\right)^n\left(\frac{3}{7^{n+1}}\right)x^n$
$\frac{\frac{1}{2}a^2}{5a^3}$
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