$\left(-3+8\right)+\left(1-10\right)-\left(-5+9\right)$
$\left(+3\right)x\:\left(+7\right)$
$\frac{3^{-2}x^4}{y^{-5}}$
$\int\left(x\cdot\cos\left(2x^2+3y\right)\right)dx$
$\left(9xy+8n\right)\left(9xy+8n\right)$
$8a^2+14a-15$
$\left(3+2i\right)^2+3i^{15}\left(3-2i^2\right)$
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