$-3\left(4+9\right)$

$\frac{2m-1}{19}=\frac{m}{10}$

$\int\frac{x^7}{\left(7-\left(3x^4\right)\right)^{\left(\frac{3}{2}\right)}}dx$

$\left(\frac{6xy^3}{5}+a\right)\cdot\left(\frac{6xy^3-a}{5}\right)$

$51,6-0,624$

$\frac{dy}{dx}+2x=x^2+2x$

$15\cdot\sin^2\left(x\right)-17\cdot\sin\left(x\right)+4=0$