$\int\:\frac{2x^3-14x^2+24x+3}{x^2-7x+12}dx$

$14\:.\:0,25$

$y'+2y=6\cdot e^x$

$\cos\left(x\right)\cdot\left(\sin\left(x\right)-\cos\left(x\right)\right)=\left(\sin\left(2x\right)-\cos\left(2x\right)-1\right)$

$\int_0^{\frac{\pi}{4}}-7x^3\sqrt{x^2+4}dx$

$\frac{\sin\left(x\right)-\csc\left(x\right)}{\sec\left(x\right)\csc\left(x\right)}$

$\frac{120}{2.8}$