$\left(2x+3\right).\left(2x-5\right)-\left(x-3\right)^2$

$2\frac{dy}{dt}=\frac{e^y\sin^2\left(t\right)}{y\sec\left(t\right)}$

$\frac{7}{9}a+\frac{1}{9}a-\frac{2}{3}a$

$7\left(-1\right)^4\left(2\right)^2+4\left(2\right)^3\left(-1\right)^2$

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

$\int_6^{6x^2}\left(\frac{3t^4}{\sqrt{t-4}}\right)dt$

$57,2+3,768$