$3\left(a^4+a^3+1\right)$
$m+n-m+n+m+n$
$\left(-15\right)\left(-15\right)$
$\sin\left(x\right)+4\cos\left(5y\right)=4$
$2csc\left(x\right)cos^2\left(\frac{x}{2}\right)$
$\left(d^5-7x^6\right)^2$
$3x^3+2x^3$
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