$2\cos^2\left(x\right)+3\sin\left(x\right)-3=-2\sin^2\left(x\right)+3\sin\left(x\right)-1$
$\int\frac{1}{\left(225+x^2\right)}dx$
$\arcsin\left(\sin\left(\frac{4\pi}{3}\right)\right)$
$-20\cdot9+180$
$3y=3x^{4x^2}$
$-1,299+5,538$
$\sqrt{\frac{4x-3}{2x+7}}$
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