$\left(a^2-49\right)\cdot\left(6\right)\cdot\left(\left(a+1\right)^2+\left(a-1\right)^2\right)$

$\frac{6dy}{dx}-5=0$

$\int\left(x^2+2x-3\right)e^{2x}dx$

$\left(+5a^2b^3\right)\left(-6b^4\right)$

$\left(1+y^2\right)\:dx=\left(\sqrt[2]{1+y^2}\cdot cos\left(y\right)-x\cdot y\right)dy$

$\frac{1-\left(\frac{1}{x+1}\right)}{x-\left(\frac{1}{x+1}\right)}$

$\int\left(1+3x\right)^4\left(2\right)dx$