Question

como faz esse calculo de matematica x=2-1+3-5+3[3+4]-2[7²-6²

Answer 1

$x=2-1+3-5+3[3+4]-2[7^2-6^2]$

$x=2-1+3-5+3*7-2*[49-36]$

$x=2-1+3-5+21-2*13$

$x=2-1+3-5+21-26$

$x=1+3-5+21-26$

$x=4-5+21-26$

$x=-1+21-26$

$x=20-26$

$x=-6$