$\int\left(x-\left(-xe^{-150x}-e^{-150x}\right)\right)\left(150e^{-150x}\right)dx$
$\int\left(2\cos\left(9y\right)+2\sin\left(7y\right)\right)dy$
$\left(5xy^{\frac{n}{2}}+6\right)\left(5xy^{\frac{n}{2}}+23\right)$
$\:21\:+\:1-2$
$\frac{sinxcosy-cosxsiny}{cosxsiny}$
$18.181\cdot2.43$
$2x^3-2x^3+3x^2+5x-4x-3$
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