$sin\left(x\right)cox\left(3x\right)+cos\left(x\right)sin\left(3x\right)=\frac{\sqrt{3}}{2}$
$sec\:x\:.\:\frac{1}{csc}=\frac{1}{cot\:x}$
$\sin\left(1.58\right)+\cos\left(1.58\right)$
$\left(x^4-y^4\right)\left(x^2-y^2\right)$
$\left(8a^2b\right)\left(3b^2\right)\left(3c^3\right)$
$\frac{6x^3-3x^2-21x-11}{3x+3}$
$\int ln\left(7x-8\right)dx$
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