$sin\left(90+x\right)+sin\left(90-x\right)$
$\int x^3y^3dx$
$5^0+3^0-2^{\cdot1}$
$42,398+2,635+3,015$
$\frac{1+cot^2x}{1-csc^2x}$
$4^3-3$
$co\:5\:ca8\:\sec\left(50\right)$
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