# previously
if (isinstance(node, BinOp) and node.op == "+"
and isinstance(node.right, BinOp) and node.right.op == "*"):
    a, b, c = node.left, node.right.left, node.right.right
# Handle a + b*c
# new and more easily readable:
match node:
    case BinOp("+", a, BinOp("*", b, c)):
# Handle a + b*c