$2cos\left(3x+1\right)-3sin\left(3x+1\right)$
$x^4-b^6$
$23,45\cdot4$
$\frac{dx}{dz}=\left(x-1\right)\left(1-2x\right)$
$\left(5a^{2}b^{3}+8ab\right)^{3}$
$x+2x^2-5x^4$
$-3\:+x=-9$
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