$1+\left(i-1\right)\frac{3}{5}+1+\frac{3i}{5}$
$\infty-14$
$sin\left(-x\right)sec\left(-x\right)cos\left(-x\right)$
$100-r^2t^6$
$\left(x-2\right)^2-8\left(2x+6\right)^2$
$\int_{-9}^0-xe^{-x^2}dx$
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