$75\cdot15$
$\int_0^{\frac{\pi}{2}}\left(3cosxsin^2x\right)dx$
$x-4=19$
$\int\left(\frac{2}{x+1}+\frac{1}{x^2+9}\right)dx$
$\left(2xy^2+4z\right)\left(3xy^2-5z\right)$
$t^3\left(\frac{2}{t}-\frac{3}{t^2}\right)^2$
$3\ln\left(x-6\right)=9$
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