$0,24\cdot0,2$

$\int\frac{cosx}{\left(5+2sinx\right)}dx$

$\cos\left(a+\frac{\pi}{2}\right)=-\sin\left(a\right)$

$\frac{3x^4-2x^3+x+3}{x^2+2}$

$\int_0^{66}\left(\frac{x^2}{33}\sqrt{66x-x^2}+\frac{\sqrt{66x-x^2}}{99}\right)dx$

$\int\frac{\left(x+2\right)}{x\left(x^{2\:}+\:3\right)}dx$

$724 ^ { 2 } \cdot 3 x$