$\frac{1+\sin\left(-x\right)}{1+\csc\left(-x\right)}=-\sin\left(x\right)$
$8\sin^2\left(3x\right)=6$
$225x^2+360xy+144y^2$
$\int x\sqrt{x^2-1}arcsen\sqrt{x^2-1}dx$
$\int e^{-4x}\cdot sin\left(\pi\cdot x\right)dx$
$12x^2+36x+27$
$1\cdot10^{-15}$
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