$\left(19-10\right)\cdot\left(-3\right)$

$\sqrt{64\cdot16}$

$\frac{tan\left(x\right)}{sec\left(x\right)}=sin\left(x\right)$

$12=\left(x+8\right)^2$

$\int_0^{\frac{\pi}{2}}\left(\frac{cosx}{\left(5+3sinx\right)^3}\right)dx$

$m^2-12m+30$

$\left(cscx-1\right)\left(cscx+1\right)=-cot^2x$